Bovine Serum Albumin (also known as BSA or "Fraction V"), is a serum albumin protein derived from bovine blood. The BSA protein is purified and fractionated through a certain heat-shock procedure, followed by extensive diafiltration and ion-exchange to remove other plasma proteins, lipids, and extraneous ions.

This Diagnostic Grade BSA Powder is designed to minimize analytes that cause background interference. Accordingly, this BSA can be used for sensitive immunoassays, including ELISAs (Enzyme-Linked Immunosorbent assay), immunoblots and immunohistochemistry, and as a stabilizing agent for protein reagents. Further applications include, e.g., for serum-free cell culture, as additive for hybridoma cell culture, protein stabilizer, and blocking agent.