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SDS7B2 Sigma-Aldrich

Prestained Molecular Weight Marker

mol wt 26,600-180,000 Da

  •  NACRES NA.25



General description

Contains a lyophilized mixture of seven prestained proteins, molecular weight range 26,600-180,000 Da.

Other Notes

Unstained protein molecular weights in Da -
Triosphosphate Isomerase from Rabbit Muscle: 26,600
Fumarase from Porcine Heart: 48,500
Pyruvate kinase from Rabbit Muscle: 58,000
Lactic dehydrogenase from Rabbit Muscle: 36,500
Lactoferrin from Human Milk: 90,000
β-Galactosidase from E. coli: 116,000
α2-Marcroglobulin from equine serum: 180,000 (subunit)


Covalent attachment to dye will result in change in apparent molecular weight


Reconstitute vial with 0.5 mL of 8 M urea and 0.5 mL of 2× sample buffer.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
The data sheets for Products SDS7B2 and B2787do not provide a specific recommendation on how long the solutions of these molecular weight marker mixtures can be kept frozen at -20°C. What information can you provide?
Our R&D group recommends that after reconstitution, the solutions should be divided into aliquots and immediately frozen; avoid repeated freeze / thaw cycles. The aliquots should last at least a year at -20°C. Storage at -80°C would even be better, if it is convenient.
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Protocols & Articles

Related Content

Molecular Weight Markers

Protein molecular weight markers, sometimes identified as protein standards or protein ladders, are used to estimate the molecular weight of proteins of interest, to monitor the progress of electroph...
Keywords: Electrophoresis, Gel electrophoresis, Isoelectric focusing, Molecular biology, PAGE, Polymerase chain reaction, Protein electrophoresis, Separation, Western blot

Peer-Reviewed Papers


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