BSA. Biotinylated Bovine Serum Albumin (Biotin-LC-BSA) (12 biotin/BSA), is used as a control in biotin estimation procedures & competitive inhibitor for anti-biotin antibodies. It has 12 moles of biotin, provided as a 2 mg/ml solution in 50 mM Na2HPO4, 100 mM NaCl pH 7.5, Storage: +4C, Size: 25mg