CB™ Protein Assay (6 Citations)
An improved Coomassie Dye based protein assay based on the Bradford Protein Assay (1). This assay is suitable for the simple and rapid estimation of protein concentration. This assay is based on a single Coomassie dye based reagent. The binding of protein to the dye results in a change of color from brown to blue. The change in color density is proportional to protein concentration. Protein estimation can be performed using as little as 0.5µg protein
CB™ Protein Assay is supplied with a simple to follow protocol. Ready to use reagent that does not require prefiltering or dilution. Simply mix the protein solution with CB™ Protein Dye and read optical density.
Note: The Coomassie dye based assay is not suitable if the protein solution contains higher than recommended concentration of detergents or other agents (see Table 1).
The following table kists the agents compatible with the CB™ Protein Assay. Table 1 also shows the acceptable concentration of reagents for standard protocols. In most cases, using a correct blank will eliminate or minimize the error caused by interference.
|Ammonium sulfate||1M||EDTA||100mM||Sodium azide||0.5%|
|Ascorbic acid||50mM||Ethanol||10%||Sodium dodecyl sulfate (SDS)||0.015%|
|Boric acid||1mM||Glucose||1M||Sodium hydroxide||0.1M|
|Brij® 35||0.06%||Glycerol||10%||Sodium phosphate||0.1M|
Sensitivity: Linear responses over the range of 0.5µg-50µg protein
Flexible Protocols: Suitable for tube or Titer plate assays
Ready to use assay reagents and no preparation required
Long shelf life, stable for 12 months
- Suitable for non-detergent solubilized proteins.
- Protein estimation in protein purification, electrophoresis, cell biology, molecular biology, and other research applications.
- Suitable for protein samples containing common laboratory agents.
|Material Safety Data Sheet|
|A Non-Animal Alternative to BSA Protein Standards|
|Protein Assay Handbook & Selection Guide||An introduction to protein assays.|