MEM-Alpha, 25 mM HEPES, nucleosides, no glutamine
MEM-Alpha, 25 mM HEPES, nucleosides, no glutamine Summary
Eagle’s Minimum Essential Medium (MEM), ALPHA modification with 25 mM HEPES buffer, ribonucleosides, and deoxyribonucleosides. Without L-glutamine.What is Eagle’s Minimum Essential Medium (MEM) -Alpha?
Eagle’s Minimum Essential Medium (MEM), a modification of Eagle’s BME, is one of the most commonly used cell culture media. MEM is suitable for a broad spectrum of mammalian cells in culture. In comparison with BME, it contains higher concentrations of amino acids and other essential nutrients. MEM is available with Earle’s salts for use in a CO2 incubator, with Hanks’ salts for use without CO2, with or without non-essential amino acids, or as Alpha modification with or without nucleosides.
Each lot of MEM Alpha is prepared from powdered base medium, tissue culture-grade water, and is sterile filtered using a 0.2 micron filter. Representative samples of
each lot of MEM Alpha are tested to confirm the absence of bacterial or fungal contamination using methods adapted from the current U.S. Pharmacopeia. MEM Alpha is manufactured in our ISO 9001:2015 certified facility.
For the specific media formulation, please refer to the Media Formulation section of the datasheet.
Specifications
Limitations
For research use only. Not for diagnostic use.
Product Datasheets
FAQs
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Why is HEPES used in cell culture?
HEPES (N-2-hydroxyethylpiperazine-N’-2-ethanesulfonic acid, pKa@37oC=7.3, useful range pH 6.6 – 8.0) is one of several biological buffers that can be used to stabilize the pH of cell culture medium. As cells grow and metabolize the cell culture medium nutrients, they typically produce excess acid – that lowers the pH of the medium. This lowering of pH can be detrimental to the continued growth of cells in culture. HEPES provides more “buffering” capacity than the bicarbonate normally found in cell culture medium – thus slowing the decline in pH as cells metabolize the nutrient medium. For some cell lines this extends the time between “feedings” and promotes healthier cell growth. HEPES can show toxicity with some cell lines, so it is not a universal panacea. Other useful biological buffers include MOPS (pKa@37oC=7.0), TRIS (pKa@37oC=7.8), and PIPES (pKa@37oC=6.7).
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