FluxMPS™ William's E Medium

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Cell Culture Media
Developed by Williams & Gunn, 1974

FluxMPS™ William's E Medium

FluxMPS™ William's E Medium is a 1X liquid, ready-to-use formulation of the specialized cell culture medium originally developed by Williams and Gunn for long-term cultivation of adult rat liver epithelial cells. It is an enriched formulation that contains higher levels of amino acids and glucose compared to earlier media, and is notable for its unique ingredients, including zinc, iron, manganese, non-essential amino acids, glutathione as a reducing agent, and methyl linoleate lipid.

  • 2 configurations: William's E (standard, with Sodium Bicarbonate), and William's E w/o Sodium Bicarbonate, each independently toggling L-Glutamine, Sodium Bicarbonate, HEPES, and Phenol Red
  • This medium has proven versatile and effective for growing primary hepatocyte cells from various species, including human-derived HepaRG cells
  • Typically requires supplementation with 5-10% fetal bovine serum (FBS), as it does not contain proteins or growth factors
  • Uses a sodium bicarbonate buffer system (2.2 g/L) and needs a 5-10% CO2 environment to maintain physiological pH
  • 2.0 g/L standard glucose concentration
  • Its effectiveness in supporting long-term cell cultures and its applicability to various cell types have made it a valuable tool in cell biology research, particularly in liver cell studies
  • Purified through FluxMPS™ quadruple-stage 0.1 micron / 0.04 micron filtration, engineered for organ-on-chip (OoC), tissue-on-chip (ToC), and lab-on-chip (LoC) microfluidic platforms
  • Available in 500 mL and 1000 mL sizes; store at 2-8°C protected from light; every standard concentration and additive is customizable on request
DCP-WME-SERIES
FluxMPS™ William's E Medium — 1X Liquid
  • Concentration1X
  • Glucose2.0 g/L
  • BufferingSodium bicarbonate (2.2 g/L), 5-10% CO2
  • Configurable supplementsL-Glutamine / Sodium Bicarbonate / HEPES / Phenol Red
  • Unique ingredientsZinc, iron, manganese, glutathione, methyl linoleate
  • FiltrationFluxMPS™ quadruple-stage, 0.04 micron final
  • Sizes500 mL, 1000 mL
  • Storage2-8°C, protected from light
RUO Williams & Gunn 1974 Foundational Customizable
Product Configuration

At-a-Glance Supplement Matrix

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William's E Medium — 2 Configurations
At-a-glance supplement matrix — click to view product page.
Name Cat No. L-Glutamine Sodium Bicarbonate HEPES Phenol Red Product Page
William's E Medium DCP-WME1X check check remove check Viewarrow_forward
William's E Medium, w/o Sodium Bicarbonate DCP-WME-B1X check remove remove check Viewarrow_forward
Customization: 1X standard concentration. 2.0 g/L standard glucose concentration. Other concentrations, additions of chemicals, compounds, proteins, supplements, a different pH, and modifications are available on request — contact support@diagnocine.com.
About William's E Medium

William's Medium E: Defined Medium for Primary Hepatocyte Isolation and Long-Term Liver Cell Culture

William's Medium E is a chemically defined, synthetic basal medium developed between 1971 and 1974 by George M. Williams and colleagues, culminating in the 1974 publication by Williams and Gunn, which presented the formulation optimized for long-term primary culture of adult rat liver epithelial cells. It is the universally accepted default medium for primary hepatocyte culture, hepatic cell line maintenance, drug-metabolism studies, hepatotoxicity testing, and hepatocyte-based tissue engineering — roles that no Eagle-lineage medium (BME, MEM, DMEM, RPMI 1640) fulfills adequately without substantial supplementation. Its distinctiveness rests on a profile engineered around the metabolic, antioxidant, lipid, and micronutrient requirements of differentiated hepatic parenchymal cells: all four fat-soluble vitamins (A, D2, E, K3), a polyunsaturated fatty acid (methyl linoleate), four ultratrace transition-metal micronutrients (Fe, Cu, Mn, Zn), ascorbic acid, reduced glutathione, sodium pyruvate, a NEAA-rich 21-amino-acid profile, and a glucose concentration of 2000 mg/L (11.1 mM) more physiologically relevant to the liver than either low-glucose (5.5 mM) or high-glucose DMEM (25 mM).

Origins and Development

George M. Williams and the Liver Cell Culture Problem

Long-term primary culture of adult mammalian liver cells was a uniquely difficult challenge through the 1960s. Hepatic parenchymal cells (hepatocytes) are highly differentiated, non-dividing or slowly cycling cells with exceptionally demanding nutritional requirements arising from their role as the body's central metabolic organ. Unlike fibroblasts or lymphoid cells, which are sustained in Eagle-lineage or RPMI media, hepatocytes rapidly lost their differentiated functions (albumin secretion, cytochrome P450 activity, gluconeogenesis, urea synthesis) in all available media. Maintaining the differentiated phenotype required physiologically relevant glucose for gluconeogenic balance, a lipid source, all four fat-soluble vitamins, trace metals for liver-specific metalloenzymes, and antioxidant support adequate for a high-oxidative-metabolism cell type. George M. Williams, working at the Naylor Dana Institute for Disease Prevention (American Health Foundation, Valhalla, New York), addressed this through iterative modifications to the medium, beginning in 1971.

The 1971 Paper: Medium D and Epithelial Liver Cell Isolation

The developmental sequence begins with Williams, Weisburger & Weisburger (1971), "Isolation and long-term cell culture of epithelial-like cells from rat liver," Experimental Cell Research 69(1): 106-112 (PMID 5124481; DOI 10.1016/0014-4827(71)90316-8). Using a differential attachment / sequential plating technique, the group isolated epithelial-like cells from the livers of 10-day-old rats using a modified MEM called William's Medium D, enriched in amino acids and formulated with twice the glucose of standard MEM. Medium D was a transitional formulation demonstrating that enriched, defined media could better sustain liver epithelial cells than Eagle-lineage standards.

The 1974 Paper: William's Medium E

Williams and Gunn, working with adult rather than young rat liver cells and refining the nutritional provisions, released the definitive formulation: Williams & Gunn (1974), "Long-term cell culture of adult rat liver epithelial cells," Experimental Cell Research 89(1): 139-142 (PMID 4373256; DOI 10.1016/0014-4827(74)90196-7). This established William's Medium E as the standard for maintaining adult liver epithelial cells, demonstrating retention of epithelial morphology in primary culture, a prerequisite for any meaningful study of hepatocyte function.

Adoption for Primary Hepatocyte Culture

Following Per Ottar Seglen's two-step collagenase portal-vein perfusion method for high-yield hepatocyte isolation (1976), William's Medium E became the standard collagenase-perfusion vehicle and the default post-isolation plating and maintenance medium for primary rat and human hepatocytes. The combination of Seglen's isolation technique and William's Medium E defines the foundation of primary hepatocyte methodology still in use today, now routinely applied to hepatocytes from rat, mouse, human, pig, sheep, and other species.

Lineage

William's Medium in the Classical Medium Family Tree

  • Standard MEM (Eagle, 1959) — the Eagle-lineage baseline from which William's Medium D was modified.
  • William's Medium D (Williams, Weisburger & Weisburger, 1971) — a modified MEM enriched in amino acids and formulated with twice the glucose of standard MEM, used to isolate epithelial-like cells from the livers of 10-day-old rats; a transitional formulation demonstrating that enriched, defined media could better sustain liver epithelial cells than Eagle-lineage standards.
  • William's Medium E (Williams & Gunn, 1974) — the definitive formulation, refined for adult rat liver epithelial cells, establishing retention of epithelial morphology in primary culture and becoming the standard for maintaining adult liver epithelial cells.
  • Adoption with Seglen's collagenase perfusion method (1976) — the combination of Seglen's two-step collagenase portal-vein perfusion isolation technique and William's Medium E defines the foundation of primary hepatocyte methodology still in use today, across rat, mouse, human, pig, sheep, and other species.
Composition

William's Medium E Standard Formulation Reference

The composition below reflects the canonical William's Medium E formulation (as in the Sigma and Gibco reference formulations and the original Williams & Gunn medium), cross-checked against the HiMedia AL125 datasheet. L-glutamine is supplied separately and added to a final concentration of 2 mM (292 mg/L) immediately before use. Quality control (HiMedia AL125 liquid): orangish-red clear solution; pH 7.00-7.60; osmolality 290-330 mOsm/kg; endotoxin NMT 1 EU/mL; 18-month shelf life. All values are as stated in the source; no additional numeric values are implied for any specific catalog number beyond what is stated here and in the supplement matrix above.

Ingredient mg/L
Calcium chloride dihydrate (CaCl2.2H2O) 265.000
Copper sulfate pentahydrate (CuSO4.5H2O) 0.0001
Ferric nitrate nonahydrate [Fe(NO3)3.9H2O] 0.0001
Magnesium sulfate, anhydrous (MgSO4) 97.670
Manganese chloride tetrahydrate (MnCl2.4H2O) 0.0001
Potassium chloride (KCl) 400.000
Sodium bicarbonate (NaHCO3) 2200.000
Sodium chloride (NaCl) 6800.000
Sodium phosphate monobasic, anhydrous (NaH2PO4) 122.000
Zinc sulfate heptahydrate (ZnSO4.7H2O) 0.0002
Amino Acid mg/L
Glycine 50.000
L-Alanine 90.000
L-Arginine (free base) 50.000
L-Asparagine monohydrate 20.000
L-Aspartic acid 30.000
L-Cysteine 40.000
L-Cystine 20.000
L-Glutamic acid 44.500
L-Glutamine (add separately, 2 mM) 292.000
L-Histidine (free base) 15.000
L-Isoleucine 50.000
L-Leucine 75.000
L-Lysine hydrochloride 87.460
L-Methionine 15.000
L-Phenylalanine 25.000
L-Proline 30.000
L-Serine 10.000
L-Threonine 40.000
L-Tryptophan 10.000
L-Tyrosine disodium salt dihydrate 50.000
L-Valine 50.000
Vitamin mg/L
Ascorbic acid (as sodium salt) 2.000
D-Biotin 0.500
Choline chloride 1.500
D-Calcium pantothenate 1.000
Ergocalciferol (Vitamin D2) 0.100
Folic acid 1.000
Menadione sodium bisulfite (Vitamin K3) 0.010
myo-Inositol 2.000
Niacinamide (Nicotinamide) 1.000
Pyridoxal hydrochloride (Vitamin B6) 1.000
Retinol acetate (Vitamin A) 0.100
Riboflavin (Vitamin B2) 0.100
Thiamine hydrochloride (Vitamin B1) 1.000
alpha-Tocopherol phosphate sodium salt (Vitamin E) 0.010
Vitamin B12 (Cyanocobalamin) 0.200
Other Components Amount
D-Glucose (Dextrose) 2000.000 mg/L
Glutathione (reduced, GSH) 0.050 mg/L
Methyl linoleate 0.030 mg/L
Phenol red (sodium salt) 10.000 mg/L
Sodium pyruvate 25.000 mg/L

William's Medium E uses the MEM Earle's salt base (NaCl, CaCl2, MgSO4, KCl, NaH2PO4, NaHCO3) but extends it with four ultratrace transition-metal micronutrients: Fe, Cu, Mn, and Zn. This trace-element set is the defining inorganic signature of William's Medium E and is absent from the Eagle-lineage media and RPMI 1640. Copper, manganese, and zinc are absent from BME, MEM, DMEM, and RPMI 1640 — the unique William's E trio. L-Glutamine is not included in the standard liquid formulation and must be added freshly to 2 mM (292 mg/L) before use; the exclusion is intentional, since glutamine degrades during storage to pyroglutamate and ammonia, so the medium is supplied glutamine-free to preserve shelf life.

Comparison

William's Medium E vs. Classical Media

Feature William's Medium E DMEM (High-Glucose) RPMI 1640 Medium 199 Waymouth MB 752/1
Developer & year G.M. Williams & Gunn - 1974 Dulbecco & Freeman, 1959 Moore et al., 1966/1967 Morgan, Morton & Parker, 1950 Charity Waymouth, 1959
Primary design goal Primary hepatocyte long-term culture Adherent monolayer culture Suspension lymphoid culture Universal comprehensive defined Serum-free L929 fibroblast
Amino acids (entries) 21 (dual cysteine + cystine) 15 20 21 18
Vitamins (count) 15 (all four fat-soluble) 8 11 17 11
Vitamin A (retinol acetate) 0.100 mg/L Absent Absent 0.140 mg/L Absent
Vitamin D2 (ergocalciferol) 0.100 mg/L Absent Absent 0.100 mg/L Absent
Vitamin E (alpha-tocopherol phosphate) 0.010 mg/L Absent Absent 0.010 mg/L Absent
Vitamin K3 (menadione) 0.010 mg/L Absent Absent 0.016 mg/L Absent
Ascorbic acid 2.000 mg/L Absent Absent 0.050 mg/L 17.500 mg/L
Vitamin B12 0.200 mg/L Absent 0.005 mg/L Absent 0.200 mg/L
Biotin 0.500 mg/L Absent 0.200 mg/L 0.010 mg/L 0.020 mg/L
Pyridoxal HCl (B6 form) Pyridoxal HCl Pyridoxine HCl Pyridoxine HCl Both forms Pyridoxine HCl
Trace metals (Cu, Mn, Zn) Present Absent Absent Absent (Fe only) Absent
Methyl linoleate (lipid) 0.030 mg/L Absent Absent Cholesterol 0.2 + Tween 80 Absent
Reduced glutathione 0.050 mg/L Absent 1.000 mg/L 0.050 mg/L 15.000 mg/L
Sodium pyruvate 25.000 mg/L Optional (110 mg/L) Absent (standard) Absent Absent
Glucose 2000 mg/L (~11.1 mM) 4500 mg/L (25 mM) 2000 mg/L (11.1 mM) 1000 mg/L (5.5 mM) 5000 mg/L (27.8 mM)
NaHCO3 2200 mg/L 3700 mg/L 2000 mg/L 2200 mg/L 2240 mg/L
pH (with NaHCO3) 7.00-7.60 ~7.2 7.0-7.4 7.2 7.1-7.7
Osmolality (with NaHCO3) 290-330 mOsm/kg 320-355 mOsm/kg 255-310 mOsm/kg 310-350 mOsm/kg 305-345 mOsm/kg
Calcium source CaCl2.2H2O 265 mg/L CaCl2.2H2O 265 mg/L Ca(NO3)2.4H2O 100 mg/L CaCl2.2H2O 265 mg/L CaCl2.2H2O 120 mg/L
Iron source Fe(NO3)3.9H2O (ultratrace) Fe(NO3)3.9H2O 0.1 mg/L None Fe(NO3)3.9H2O 0.72 mg/L None
Preformed purines None None None Adenine, hypoxanthine Hypoxanthine
Fat-soluble vitamins A, D2, E, K3 (all four) None None A, D2, E, K3 (all four) None
L-Glutamine supplied Separately (add 2 mM fresh) In standard formulation In standard formulation In standard formulation In standard formulation
Primary validated cells Primary hepatocytes, HepaRG HEK293, MEFs Jurkat, PBMCs, hybridomas Chick fibroblasts, oocytes L929 (serum-free)

William's Medium E: G.M. Williams & Gunn, 1974. DMEM: Dulbecco & Freeman 1959. RPMI 1640: Moore et al., 1966/1967. Medium 199: Morgan, Morton & Parker, 1950. Waymouth MB 752/1: Charity Waymouth, 1959.

Platform Advantage

Why FluxMPS™

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Quadruple-Stage Purity

Every FluxMPS™ William's E configuration is purified to 0.04 microns — finer than any ready-to-use cell culture media currently available — before it ever reaches your chip.

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Engineered for Microfluidics

Designed from the ground up for Organ-on-Chip (OoC), Tissue-on-Chip (ToC), and Lab-on-Chip (LoC) platforms, where the medium itself is part of the instrument.

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Particulate & Aggregate Removal

The quadruple-stage architecture eliminates microscopic particulates and protein aggregates that silently block micro-channels and disrupt laminar flow — a particular concern for collagen-coated, hepatocyte-specific microfluidic cultures.

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Optical Clarity

Optical clarity supports real-time imaging and integrated biosensing on Organ-on-Chip platforms without background interference.

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Regulatory-Aligned Foundation

Formulated to support FDA-recognized physiological modeling standards, providing a validated, reproducible media foundation as downstream data moves toward regulatory scrutiny.

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Translational Research Ready

A single, consistent media platform supporting drug discovery, toxicology screening, and translational research from bench through preclinical modeling.

Manufacturing

Quadruple-Stage Filtration

Every FluxMPS™ William's E batch passes through a four-stage filtration train before final fill, engineered specifically for microfluidic cell culture applications.

  1. 1

    0.1 µmPre-filtration Stage One

    Bulk particulate reduction prior to sterile filtration.

  2. 2

    0.1 µmPre-filtration Stage Two

    Second-pass pre-filtration to protect the downstream sterile filters and extend their working life.

  3. 3

    0.04 µmSterile Filtration Stage One

    First sterile-filtration pass at 0.04 microns — finer than any ready-to-use cell culture media currently available.

  4. 4

    0.04 µmSterile Filtration Stage Two

    Second sterile-filtration pass, eliminating microscopic particulates and protein aggregates before final fill.

Built for Continuous Flow

Zero-clogging performance across complex micro-channel geometries and long-term automated perfusion studies running continuously for weeks.

4
Filtration stages
0.04µm
Final sterile-filtration rating
FluxMPS™ William's E Medium Quadruple-stage filtration system diagram - two 0.1 micron pre-filtration stages followed by two 0.04 micron sterile-filtration stages, engineered for organ-on-a-chip (OoC), tissue-on-a-chip (ToC), and lab-on-a-chip microfluidic cell culture media applications by Diagnocine.
Validated Applications

Validated Cell Lines & Applications

This medium has proven versatile and effective for growing primary hepatocyte cells from various species, including human-derived HepaRG cells. Its effectiveness in supporting long-term cell cultures and its applicability to various cell types have made it a valuable tool in cell biology research, particularly in liver cell studies.

Primary Application

Primary Hepatocyte Isolation & Culture

William's Medium E is the globally established standard medium for every stage of primary hepatocyte work: collagenase perfusion isolation, post-digestion washing and Percoll gradient separation, and post-isolation culture on collagen-I-coated plates with serum, insulin, and dexamethasone or hydrocortisone. Species validated include rat, mouse (C57BL/6), human (resection specimens), pig, sheep, and zebrafish.

Human Hepatoma Model

HepaRG Cells

HepaRG is a bipotent human hepatoma progenitor line that differentiates into hepatocyte-like cells expressing CYP3A4, CYP2E1, and albumin. William's Medium E is the standard base medium for all stages of HepaRG culture, via a proliferation phase followed by a 2% DMSO differentiation phase, producing the highest expression of liver-specific enzymes and characteristic bile-canaliculi morphology.

Hepatoma Lines

HepG2 & Huh7

HepG2 (hepatocellular carcinoma) and Huh7 (hepatoma) are sometimes cultured in William's Medium E for experiments requiring a liver-appropriate medium, though DMEM + 10% FBS is their more common routine maintenance medium. For hepatocyte-specific drug- or lipid-metabolism experiments, William's Medium E avoids the confounding effects of DMEM's supraphysiologic glucose on lipogenic enzyme induction.

Stem Cell Differentiation

iPSC Hepatocyte Differentiation

A 2016 study demonstrated improved survival and initiation of hepatocyte differentiation when human iPSCs were shifted from pluripotency media to William's Medium E prior to hepatocyte-differentiation-inducer treatment, establishing the medium as a transitional bridge between pluripotency maintenance and hepatocyte identity induction.

Regulatory Toxicology

Drug Metabolism & Cytochrome P450 Studies

William's Medium E is the standard medium for in vitro drug metabolism studies with primary hepatocytes in regulatory (OECD, ICH) and pre-regulatory settings. CYP-induction testing maintains primary hepatocytes in William's Medium E for 24-72 hours before inducer exposure; the EURL-ECVAM DB-ALM protocol for CYP induction specifies William's Medium E as the culture medium for validated primary hepatocyte CYP induction assays.

Carcinogenesis & Additional Uses

Chemical Carcinogenesis, Hepatotoxicity & Progenitor Lines

Rat liver epithelial cells in William's Medium E respond appropriately to procarcinogens requiring enzymatic activation, and primary rat and human hepatocytes in William's Medium E are used for acute and repeated-dose hepatotoxicity assessment. Liver progenitor lines (e.g., BC2/Bac2) are maintained in William's Medium E + serum + insulin + hydrocortisone hemisuccinate, and differentiated HepaRG cells in William's Medium E + DMSO serve as a primary in vitro hepatitis B virus entry/replication model.

Scientific Significance

Practical Considerations

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L-Glutamine Instability

William's Medium E is supplied without L-glutamine because glutamine hydrolyzes to pyroglutamate and ammonia during storage. For primary hepatocytes, this matters acutely: hepatocytes are the primary site of ammonia detoxification, and ammonia levels above ~1 mM inhibit urea-cycle enzyme expression. Add L-glutamine freshly at 2 mM and use within approximately 4 weeks of addition.

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DMSO in HepaRG Differentiation & Collagen Coating

The 2% DMSO added during HepaRG differentiation is a functional component, not a cryoprotectant: at this concentration, it activates CAR and PXR, driving hepatocyte-specific gene programs including CYP induction. Unlike DMEM-supported lines, primary hepatocytes and HepaRG cells in William's Medium E require collagen-I or Matrigel coating for attachment; uncoated surfaces cause rounding, loss of polarity, and accelerated de-differentiation even in fully supplemented medium.

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Serum-Free Use

William's Medium E can be used serum-free for primary hepatocytes when supplemented with insulin, transferrin, selenium, dexamethasone or hydrocortisone, and free fatty acids bound to delipidated albumin; chemically defined, serum-free William's E formulations are commercially available for GMP-compliant applications.

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Light Sensitivity

Retinol acetate, riboflavin, and methyl linoleate make William's Medium E more photosensitive than DMEM or RPMI 1640; follow amber-vessel/foil storage and minimize light exposure.

FAQ

Frequently Asked Questions

Please select the supplement(s) of interest — L-Glutamine, Sodium Bicarbonate, HEPES, or Phenol Red — in the filter above, then click Search. Every configuration that includes all checked supplements is highlighted, and you can click straight through via the catalog-number link or the View button.
Yes. Every FluxMPS™ William's E configuration is purified through a quadruple-stage filtration system down to 0.04 microns, designed specifically for Organ-on-Chip (OoC), Tissue-on-Chip (ToC), and Lab-on-Chip (LoC) platforms where the medium itself is part of the instrument.
William's E Medium typically requires supplementation with 5-10% fetal bovine serum (FBS), as it does not contain proteins or growth factors. It can also be used serum-free for primary hepatocytes when supplemented with insulin, transferrin, selenium, dexamethasone or hydrocortisone, and free fatty acids bound to delipidated albumin.
These are unique ingredients that reflect the hepatocyte's role as the body's principal site of trace-metal storage and lipid metabolism. Copper, manganese, and zinc support liver-specific enzymes and antioxidant defenses, iron supports heme proteins, and methyl linoleate provides an essential fatty-acid source for hepatic lipid metabolism in the absence of serum-derived fatty acids.
L-Glutamine is supplied separately because it hydrolyzes to pyroglutamate and ammonia during storage. For primary hepatocytes this matters acutely, since ammonia levels above approximately 1 mM inhibit urea-cycle enzyme expression. Add L-glutamine freshly to 2 mM before use and use within approximately 4 weeks of addition.
Yes. Primary hepatocytes and HepaRG cells in William's Medium E require collagen-I or Matrigel coating for attachment; uncoated surfaces cause rounding, loss of polarity, and accelerated de-differentiation even in fully supplemented medium.
Yes. The 1X concentration and 2.0 g/L glucose level shown here are standard values; other concentrations, additions of chemicals, compounds, proteins, supplements, a different pH, and other modifications are available on request at support@diagnocine.com.
This William's E family is supplied in 500 mL and 1000 mL sizes. Store at 2-8°C, away from bright light. Retinol acetate, riboflavin, and methyl linoleate make this medium more photosensitive than DMEM or RPMI 1640, so amber-vessel/foil storage and minimizing light exposure are recommended.
Bibliography

Verified References

  • Williams, G.M., Weisburger, E.K. & Weisburger, J.H. (1971). Isolation and long-term cell culture of epithelial-like cells from rat liver. Experimental Cell Research, 69(1): 106-112. PMID 5124481. DOI 10.1016/0014-4827(71)90316-8.
  • Williams, G.M. & Gunn, J.M. (1974). Long-term cell culture of adult rat liver epithelial cells. Experimental Cell Research, 89(1): 139-142. PMID 4373256. DOI 10.1016/0014-4827(74)90196-7.
  • Williams, G.M. (1976). Primary and long-term culture of adult rat liver epithelial cells. Methods in Cell Biology, 14: 357-364.
  • Laishes, B.A. & Williams, G.M. (1976). Conditions affecting primary cell cultures of functional adult rat hepatocytes. I. The effect of insulin. In Vitro, 12: 521-532.
  • Seglen, P.O. (1976). Preparation of isolated rat liver cells. Methods in Cell Biology, 13: 29-83.
  • Guillouzo, A., et al. (2007). The human hepatoma HepaRG cells: a highly differentiated model for studies of liver metabolism and toxicity of xenobiotics. Chemico-Biological Interactions, 168(1): 66-73.
  • Yao, T. & Asayama, Y. (2017). Animal-cell culture media: history, characteristics, and current issues. Reproductive Medicine and Biology, 16(2): 99-117. PMID 29259457. PMC5661806.
FluxMPS™ Platform

FluxMPS™ — Precision Cell Culture Media for Microphysiological Systems

Built for the architecture of the future. Not the flask of the past.

Traditional cell culture media were formulated for static well plates and flasks — environments that tolerate impurities, precipitates, and particle loads that would immediately compromise a microfluidic system. FluxMPS™ was designed from the ground up for Organ-on-Chip (OoC), Tissue-on-Chip (ToC), and Lab-on-Chip (LoC) platforms, where the medium itself is part of the instrument.

Purity That Protects Your Platform

FluxMPS™ is purified to 0.04 microns — finer than any ready-to-use cell culture media currently available. At this level, the microscopic particulates and protein aggregates that silently block micro-channels, disrupt laminar flow, and generate false biological signals are eliminated before the media ever reaches your chip.

The result: your platform stays operational, your data stays clean, and your biology drives the result — not your media.

Engineered for Flow, Not Just Growth

The name FluxMPS™ reflects its core design principle. Every component is optimized for consistent, laminar flow performance across:

  • Complex micro-channel geometries
  • Capillary-bed and vascular simulations
  • Long-term automated perfusion studies running continuously for weeks

Zero-clogging performance is not a feature — it is the baseline specification.

Applications & Performance

Application What FluxMPS™ Delivers
Microfluidics Stable shear stress; no channel blockage
Metabolic Tracing Ultra-pure matrix with no contaminant interference
Long-term Perfusion Consistent formulation stability over weeks of continuous flow
Organ-on-Chip Optical clarity for real-time imaging and integrated biosensing

Regulatory Foundation

FluxMPS™ is formulated to support FDA-recognized physiological modeling standards, providing a validated, reproducible media foundation for drug discovery, toxicology screening, and translational research. When your downstream data needs to stand up to regulatory scrutiny, your upstream media cannot be an afterthought.

The Bottom Line

Microfluidic platforms are precision instruments. They require precision inputs.

FluxMPS™ is the only ready-to-use cell culture medium engineered specifically to meet that standard — protecting your chip, your cells, and your science.

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