Description_x000D_ Amino Acid Sequence_x000D_ Gly-Ile-Val-Glu-Gln-Cys(SO3H)-Cys(SO3H)-Ala-Ser-Val-Cys(SO3H)-Ser-Leu-Tyr-Gln-Leu-Glu-Asn-Tyr-Cys(SO3H)-Asn_x000D_ Packaging_x000D_ 1, 5, 10, 50 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Human insulin is made up of 51 amino acids. It consists of two peptide chains, 21 amino acids make up A-chain and chain B contains 31 amino acids. The two chains are linked together by a disulfide bond, to form a classical insulin fold with three α helices, chain A having two and one in chain B._x000D_ Insulin regulates the cellular uptake, utilization, and storage of glucose, amino acids, and fatty acids. It inhibits the breakdown of glycogen, protein, and fat. The α chain contains an intrachain disulfide bond._x000D_ Preparation Note_x000D_ Prepared by a modification of Sanger, F., et al., Biochem. J., 44, 126 (1949).