Heat shock fraction, protease free, fatty acid free, essentially globulin free, pH 7, ≥98%, Synonym: Albumin bovine serum, BSA, Bovine albumin. Bovine Serum Albumin has been used: as a constituent of the medium used for the differentiation of human pluripotent stem cells, in enzyme-linked immunosorbent assay (ELISA) and sandwich ELISA, and to permeabilize fetal cortical cells.