Bovine Serum Albumin (BSA) is a little protein of 66kDa present in animal serum and makes up approximately 60% of all proteins.
Because of its negative charge, Bovine Serum Albumin binds water, salts, fatty acids, vitamins and hormones and carries these bound components between tissues and cells.
Albumins are frequently used as stabilizers for other solubilized proteins (e.g., labile enzymes).
Due to its high stability and less interference with biological activities, BSA is used on many biochemical applications such as Immunochemistry and Western-Blot or ELISA, in which it is used as a blocking reagent.
