Bovine Serum Albumin (also known as BSA) is a serum albumin protein derived from bovine blood. It is purified and fractionated through a specific heat-shock procedure, followed by extensive diafiltration and ion-exchange to remove other plasma proteins, lipids, and extraneous ions. BSA Protease Free is particularly suitable for applications with protease-sensitive protein components. BSA has numerous biochemical applications, including ELISAs (Enzyme-Linked Immunosorbent Assay), immunoblots, and immunohistochemistry. It is also used as a stabilizer and cell growth supplement for cell and microbial cultures.