bovine serum albumin,BSA

What is bovine serum albumin?
Bovine serum albumin (bsa bovine serum albumin or "Fraction V") is a serum
albumin protein derived from cows. It is often used as a protein concentration
standard in lab experiments.
The nickname "Fraction V" refers to albumin being the fifth fraction of the
original Edwin Cohn purification methodology that made use of differential
solubility characteristics of plasma proteins. By manipulating solvent
concentrations, pH, salt levels, and temperature, Cohn was able to pull out
successive "fractions" of blood plasma. The process was first commercialized with
human albumin for medical use and later adopted for production of BSA.

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