性能描述

保存温度：−20°C

Biochem/physiol Actions
Two-chain polypeptide hormone produced by the β-cells of pancreatic islets. Its molecular weight is ~5800 Da. The α and β chains are joined by two interchain disulfide bonds. The α chain contains an intrachain disulfide bond. Insulin regulates the cellular uptake, utilization, and storage of glucose, amino acids, and fatty acids and inhibits the breakdown of glycogen, protein, and fat.

性状：白色或类白色的结晶粉末
熔点：233℃（分解）
比旋度：-64°±8°(C=2,0.003mol/L NaOH)
溶解性：在水、乙醇、氯仿或乙醚中几乎不溶；在矿酸（无机酸）或氢氧化碱溶液中易溶
酸碱性：两性，等电点pI5.35-5.45

胰岛素是由胰岛β细胞受内源性或外源性物质如葡萄糖、乳糖、核糖、精氨酸、胰高血糖素等的刺激而分泌的一种蛋白质激素。胰岛素是机体内唯一降低血糖的激素，同时促进糖原、脂肪、蛋白质合成。