The amino acid sequence and structure of human albumin have been determined. Human albumin is a protein with no carbohydrate content. It is a single polypeptide chain with one free sulfhydryl group on residue # 34 and 17 intrachain disulfide bonds.
BSA contains about 583 amin acid residues and does not have carbohydrates within a single polypeptide chain. It contains 17 interchain disulfide bridges and 1 sulfhydryl group at pH 5-7.