MEM α, nucleosides, no phenol red
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MEM α, nucleosides, no phenol red
Gibco™

MEM α, nucleosides, no phenol red

Minimum Essential Medium (MEM) α is widely used for mammalian cell culture as well as selection for transfected DHFR negativeRead more
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41061029500 mL
4106103710 x 500 mL
Catalog number 41061029
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686.20
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500 mL
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Price (CNY)
686.20
Online Exclusive
Ends: 31-Dec-2025
875.00
Save 188.80 (22%)
Each
Add to cart

Minimum Essential Medium (MEM) α is widely used for mammalian cell culture as well as selection for transfected DHFR negative cells. MEM α can be used with a variety of suspension and adherent mammalian cells, including keratinocytes, primary rat astrocytes, and human melanoma cells. We offer a variety of Gibco™ MEM α modifications for a range of cell culture applications. Find the right formulation using the media selector tool.


This MEM α is modified as follows:
WithWithout
• Ribonucleosides• Phenol Red
• Deoxyribonucleosides 
• L-glutamine 


The complete formulation is available.

Gibco™ MEM α is a modification of Minimum Essential Medium (MEM) that contains non-essential amino acids, sodium pyruvate, lipoic acid, vitamin B12, biotin, and ascorbic acid. MEM α is available without nucleosides for use as a selection medium for DG44 and other DHFR negative cells. This product is made with Earle’s salts.

Product Use
For Research Use Only: Not intended for animal or human diagnostic or therapeutic use.

MEM α contains no proteins, lipids, or growth factors. Therefore, MEM α requires supplementation, commonly with 10% Fetal Bovine Serum (FBS). MEM α uses a sodium bicarbonate buffer system (2.2 g/L) and therefore requires a 5-10% CO2 environment to maintain physiological pH.

For Research Use Only: Not intended for animal or human diagnostic or therapeutic use.
Specifications
Cell LineHeLa, BHK-21, 293, HEP-2, HT-1080, MCF-7, and fibroblasts
Cell TypePrimary Rat Astrocytes
Concentration1 X
Manufacturing QualitycGMP-compliant under the ISO 13485 standard
Product LineGibco™
Product TypeMEM α (Minimum Essential Medium α)
Quantity500 mL
Shelf Life12 Months From Date of Manufacture
Shipping ConditionRoom Temperature
ClassificationAnimal Origin-free
FormLiquid
Serum LevelStandard Serum Supplementation
SterilitySterile-filtered
Sterilization MethodSterile-filtered
With AdditivesLow Glucose, Glutamine, Sodium Pyruvate, Ribonucleosides, Deoxyribonucleosides
Without AdditivesNo HEPES, No Phenol Red
Unit SizeEach
Contents & Storage
Storage conditions: 2-8° C. Protect from light
Shipping conditions: Ambient
Shelf life: 12 months from date of manufacture

Frequently asked questions (FAQs)

Where can I find the osmolality for MEM Medium?

The osmolality is listed in the COA for the particular lot number of the medium.

Find additional tips, troubleshooting help, and resources within our Cell Culture Support Center.

I understand that some media are worse than others for fluorescence imaging. How do I choose?

Most media contain phenol red, which can quench fluorescent dyes in the visible wavelengths. Most media also contain autofluorescent components, such as riboflavin, which can reduce signal-to-background. We offer FluoroBrite DMEM and HEPES-based Live Cell Imaging Solution, which have been optimized for fluorescent imaging. We also offer a number of media without phenol red. But if none of these are reasonable options for your experiment, then we also offer BackDrop Background Suppressor ReadyProbes Reagent, which can be added to quench media autofluorescence.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Should I be concerned about phenol red in my media when labeling my live cells with fluorescent dyes?

Some cell types accumulate phenol red, and this can pose a problem in the use of many fluorescent probes. Phenol red can quench visible-wavelength dyes and, although phenol red is non-fluorescent, various impurities may be fluorescent. We have many phenol red-free media to choose from. Our Live Cell Imaging Solution (HEPES-based) and our FluoroBrite DMEM have been optimized to be phenol red-free as well as to be non-autofluorescent.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

How long can I keep my media after supplementing with serum?

Generally speaking, media can be used for up to three weeks after supplementation with serum. There are no formal studies to support this, but it is the rule of thumb used by our scientists.

Find additional tips, troubleshooting help, and resources within our Mammalian Cell Culture Basics Support Center.

My medium was shipped at room temperature but it is supposed to be stored refrigerated. Is it okay?

We routinely ship media that require long-term storage in the refrigerator at room temperature. We have done studies on representative media formulations to show that media can be at room temperature for up to a week without a problem.

Find additional tips, troubleshooting help, and resources within our Mammalian Cell Culture Basics Support Center.

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