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Minimum Essential Media (MEM) in Earle’s Buffer
Minimum Essential Media (MEM) in Earle’s Buffer was originally developed by Harry Eagle. MEM is available with Earle’s salts for use in a CO2 incubator, or with Hanks’ salts for use without CO2.
Description
Background
Minimum Essential Media (MEM) in Earle’s Buffer is a modification of Basal Medium Eagle (BME) which was originally developed by Harry Eagle. It also includes higher concentrations of amino acids for cultured mammalian cells. Moreover, Minimum Essential Media (MEM) in Earle’s Buffer is available with Earle’s salts for use in a CO2 incubator, or with Hanks’ salts for use without CO2.
PurMa™ MEM media includes Earle’s Buffer
As the composition of Earle’s buffer, it contains:
- Calcium chloride
- Magnesium sulfate
- Potassium chloride
- Sodium bicarbonate
- Sodium chloride
- Sodium Phosphate, monobasic
PurMa Biologics manufactures 118 types of MEM, it also includes:
- Low level of glucose (1.00 g/ liter)
- Sodium bicarbonate (2.2 g/L)
- 2 mM L-glutamine (292 mg/L)
Why PurMa Biologics? Why we stand behind our cell culture media:
Our products are the outcome of 30 years of experience in cutting edge science. We routinely manufacture over 1500 media. We have the most comprehensive collection of cell and tissue culture media. Moreover, We utilize %99 pure amino acids. This will significantly increase the consistency among your experiments, and the result of your lab. Considering the highest quality, our prices certainly are extremely reasonable.
Application:
Minimum Essential Media (MEM) in Earle’s Buffer has been used for cell lines such as HeLa, BHK-21, 293, HEP-2, HT-1080, MCF-7, and fibroblasts as well as primary rat astrocytes. Additionally, MEM in Earle’s buffer uses a sodium bicarbonate buffer system (2.2 g/L) that requires a 5–10% CO2 environment to maintain physiological pH.
Formulation
For detailed formulation visit “the formulation Tab” as well as by clicking here: MEM Formulation in Earl’s Buffer
References
- Culture of granulosa cells in collagen gels: the influence of cell shape on steroidogenesis. Carnegie et al. Biol Reprod. 1988 May;38(4):881-90. doi: 10.1095/biolreprod38.4.881. PMID: 3401543
- Myelin formation in rat dorsal root ganglion cultured in a serum-free medium. Ninomiya et al. J Anat. 1987 Jun;152:209-13. PMID: 3654371
| 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 | N/A |
| Indicator | Phenol red |
| Mycoplasma Detection | Negative |
| Sterility Tested | Sterile filtered using 0.22 µm filter |
| Form | Liquid |
| Shipping Condition | Room temperature |
Additional information
| Condition | MEM Standard Formulation, MEM w/o Glutamine, MEM w/o Phenol Red, MEM w/o Sodium Bicarbonate, MEM w/o Glucose, MEM w/o Glutamine, w/o Phenol Red, MEM w/o Glutamine, w/o Sodium Bicarbonate, MEM w/o Glutamine, w/o Phenol Red, w/o Sodium Bicarbonate, MEM 15 mM HEPES (3.6 g/L), MEM 25 mM HEPES (5.9 g/L), MEM With Sodium Pyruvate (0.11 g/L), MEM High Glucose (4.5 g/L), MEM High Sodium Bicarbonate (3.7 g/L), MEM Low Sodium Bicarbonate (0.35 g/L), MEM Low Sodium Bicarbonate (0.85 g/L) |
|---|---|
| Format | Liquid, Powder |
| Size | 10 X 1000ml, 10 X 500ml, 1 x 500 ml, 6 x 500 ml, 1 x 1000 ml, 6 x 1000 ml, 1 x 10 L, 1 x 50 L |
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.
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.
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!
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.
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.
Very fast, efficient, and economic service. Great for new PIs like me.
Frequently asked questions
How should I store Minimum Essential Media (MEM) 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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