蓖麻毒素（ｒｉｃｉｎ）是一种从蓖麻子中提取的一种植物蛋白毒素。分子由Ａ、Ｂ两条多肽链组成。现已证明：蓖麻毒素是一种细胞毒，Ｂ链与细胞表面糖蛋白结合，Ａ链通过酶催化灭活核糖体６０Ｓ亚基而抑制细胞蛋白质的合成。由于蓖麻毒素来源广泛，毒性较高，已被外军作为武器 Ricin is a plant protein toxin extracted from castor beans. Molecular from A, B two polypeptide chain. It has been shown that ricin is a cytotoxic agent that binds to the cell surface glycoprotein and chain A inhibits the synthesis of cellular proteins by enzymatic inactivation of the 60S subunit of ribosomes. Due to the wide range of sources of ricin, high toxicity, foreign troops have been used as a weapon