Chemically Defined MEM Alpha-Modification (CD-MEM-α) in Earle’s Buffer
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SKU: Select options below to see it Categories: Cell Culture Media, MEM Alpha Modification in Earle’s Buffer (MEM-α) Tags: Advanced, Advanced MEM Alpha, Cell Culture, Earle's Buffer, EBSS, glucose, Human Transferrin, L-Alanyl-L-Glutamine, MEM Alpha, MEM-α, Phenol Red, Recombinant Insulin, Serum Reduction, Sodium Bicarbonate, Without Phenol Red

Chemically Defined MEM Alpha-Modification (CD-MEM-α) in Earle’s Buffer

PurMa™ Chemically Defined CD MEM Alpha in EBSS (CD-MEM-α/EBSS) medium does not need any serum, fully synthetic and is free of any trace of animal products.  Additionally, the cell growth with CD-MEM-α/EBSS Medium is equivalent to Medium+ 10% FBS.

SKU Select options below to see it
SKU: N/A Categories: Cell Culture Media, MEM Alpha Modification in Earle’s Buffer (MEM-α) Tags: Advanced, Advanced MEM Alpha, Cell Culture, Earle's Buffer, EBSS, glucose, Human Transferrin, L-Alanyl-L-Glutamine, MEM Alpha, MEM-α, Phenol Red, Recombinant Insulin, Serum Reduction, Sodium Bicarbonate, Without Phenol Red

Description

Background

PurMa™ Chemically Defined CD MEM Alpha in EBSS (CD-MEM-α /EBSS) is a proprietary formulation used to grow cells in vitro without any undefined or animal-derived components. Moreover, CD-MEM-α/EBSS Medium contains known quantities of pure chemicals, including amino acids, vitamins, salts, sugars, and more importantly a proprietary combination of synthetic growth factors.

It is absolutely crucial to mention that the PurMa™ Growth Supplement for each conventional media such as DMEM, IMDM, RPMI-1640… (base media) are slightly different in combination, amount of several growth factors, ions, chemicals, pH with particular adjustments need to be done, based on the environments the base media provides.

This provides a consistent and controlled environment for cell growth and research. Noticeably, CD-MEM-α/EBSS Medium is essential for applications that require reproducibility and regulatory compliance as well as for studying specific cellular processes without extraneous variables. Furthermore, CD-MEM-α/EBSS Medium is designed for custom formulations tailored for various cell types

CD-MEM-α in Earle’s Buffer Graph

Important Notes:

It is crucially vital, for a gradual transition from media containing FBS to chemically defined cell culture media, to follow these steps:

  • Starting Point: 10% FBS+ (control) (you need two controls, one to be left in only 10% FBS and continue monitoring for comparing with 0% FBS + PurMa™ Chemically Defined Medium. The second one chemically defined medium + 10% FBS which is going through the reduction of FBS process)
  • 48 hours later: 8% FBS in + PurMa™ Chemically Defined Medium
  • 48 hours later: 6% FBS in + PurMa™ Chemically Defined Medium
  • 48 hours later: 4% FBS + PurMa™ Chemically Defined Medium
  • 48 hours later: 2% FBS + PurMa™ Chemically Defined Medium
  • 48 hours later: 1% FBS + PurMa™ Chemically Defined Medium
  • 24 hours later: 0% FBS and only PurMa™ Chemically Defined Medium

Importantly, for each change, spin down and fully discard the media and replace it with the less percentages of FBS.

Noticeably, you don’t have to start with a huge number of cells (~500,000 cells/ml). Additionally, we strongly recommend you start with more than one plate as some of the plates might get contaminated

So, once the cells are kept in chemically defined Media, you should always keep them in the same chemically defined medium from the same vendor and the same formulation, even for freezing (see below).

Usually, after you get your cells adapted to PurMa™ Chemically Defined Medium you need to make several plates and freeze down several vials. The mentioned cells are adapted to chemically defined medium and when you thaw them in the first week, in addition to PurMa™ Chemically Defined Medium, you need to add 10% PurMa™ CD Booster (Cat# P3C10144).

 

Formulation

The CD-MEM-α/EBSS Medium includes a base formulation including L-Alanine -L Glutamine :Base formulation for CD MEM in EBSS P3C310123

Additionally, CD-MEM-α/EBSS Medium contains a proprietary synthetic cocktail of specific growth factors, hormones, and other nutrients which make it independent of any serum and any trace of animal products.

References

  1. The growth of L-cells and Vero cells on an autoclavable MEM-peptone medium. L Keay Biotechnology and bioengineering, 19(3), 399-411 (1977-03-01).
  2. Minimum essential medium alpha (MEM) enhances assisted reproductive technology results. I. Mouse embryo study. Wun WS, Wun CC, Grunert GM. J Assist Reprod Genet. 1994 Jul;11(6):303-7. doi: 10.1007/BF02215717. PMID: 7734915.
  3. Alpha-minimum essential medium (MEM) enhances in vitro hatched blastocyst development and cell number per embryo over Ham’s F-10. Roudebush WE, Often NL, Butler WJ. J Assist Reprod Genet. 1994 Apr;11(4):203-7. doi: 10.1007/BF02211809. PMID: 7711383.
Parameter Specification
Appearance Red, clear liquid
pH 7.2 ± 0.1
Osmolality 275-360 mOsm/L
Endotoxin NMT< 2EU/mL
Mycoplasma Negative
Suitability  Suitable for mammalian cell culture
Additive Sodium pyruvate
Indicator Phenol red
Mycoplasma Detection Negative
Sterility Tested Sterile filtered using 0.1 µm filter, 3 Times
Form Liquid
Shipping Condition  Room temperature

 

Additional information

Condition

CD-MEM-α , Standard Formulation, CD-MEM-α , w/o L-Alanyl-L-L-Alanyl-L-L-Alanyl-L-Glutamine, CD-MEM-α , w/o Phenol Red, CD-MEM-α , w/o Sodium Bicarbonate, CD-MEM-α , w/o Glucose, CD-MEM-α , w/o Lipoic Acid, CD-MEM-α , w/o L-Alanyl-L-Glutamine, w/o Phenol Red, CD-MEM-α , w/o L-Alanyl-L-Glutamine, w/o Sodium Bicarbonate, CD-MEM-α , w/ L-Alanyl-L-Glutamine, w/o Phenol Red, w/o Sodium Bicarbonate, CD-MEM-α , 15 mM HEPES (3.6 g/L), CD-MEM-α , 25 mM HEPES (5.9 g/L), CD-MEM-α , w/o Sodium Pyruvate, CD-MEM-α , High Glucose (4.5 g/L), CD-MEM-α , High Sodium Bicarbonate (3.7 g/L), CD-MEM-α , Low Sodium Bicarbonate (0.85 g/L)
Size

1X 100 ml, 1X 1000 ml, 1X 500 ml

Documents

Certificate of Analysis (COA): Available upon request for your specific order — email info@purmabiologics.com and we will send the current lot documentation.

Safety Data Sheet (SDS): Available upon request — email info@purmabiologics.com.

What our customers say about PurMa Biologics

Feedback from labs we supply, across our full catalogue.

★★★★★
PurMa products are of excellent quality and highly reliable.
East Tennessee State University Verified customer
★★★★★
I've ordered cell culture media multiple times. Great prices and excellent customer service. The ordering process was smooth, and everything arrived as expected. I'll definitely be purchasing from them again.
Ghazal Rastegar UT Dallas
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We buy all of our cell culture media, fetal bovine sera, and lipid-depleted sera from PurMa. The quality of their reagents is absolutely top-notch, giving us reliable, repeatable results in our experiments. We highly recommend PurMa!
Gregory Mullen OU Health Sciences Center
★★★★★
We have been working with PurMa biologics for the past several years, we buy cell culture related media like DMEM F12 and EMEM and Fetal Bovine Serum. We appreciate the high quality and reasonable price, and great customer service.
Haus Bio Verified customer
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We purchase everything we need related to cell and tissue culture from PurMa, reagents like: DMEM, LL15, EMEM, FBS, trypsin, antibiotics mix100X and... Always great quality, fast processing and shipping. We are totally satisfied.
Verified Customer
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Very fast, efficient, and economic service. Great for new PIs like me.
Surendra Shukla OU Health Sciences Center

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Frequently asked questions

How should I store Chemically Defined MEM Alpha-Modification (CD-MEM-α) in Earle’s Buffer?

Store at 2 to 8 degrees C, protected from light, and do not freeze unless the label states otherwise. Freezing can precipitate salts and degrade light sensitive components such as riboflavin and folic acid. Always follow the storage line on the Certificate of Analysis for the specific lot.

What is the shelf life once opened?

Unopened and correctly stored, the typical shelf life is 12 months from manufacture. Once opened, use within about four weeks and always handle in a laminar flow hood, since the practical limit after opening is contamination risk rather than chemical stability.

Is it sterility and endotoxin tested?

Yes. Every lot is sterile filtered and tested for sterility and endotoxin, and a Certificate of Analysis is issued for each lot. The COA is available on request for any catalogue number.

Do I need to add L-glutamine?

It depends on the formulation you order. Standard formulations may contain free L-glutamine, which degrades in solution over time, while MAX formulations use a stable L-alanyl-L-glutamine dipeptide that does not require fresh supplementation. Check the option you have selected before adding more.

Can I order this in bulk or as a custom formulation?

Yes. Bulk volumes and custom formulations are made to order, including adjusted glucose, bicarbonate, buffering and cation content. Use the request bulk pricing button on this page and include the specification you need.

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