电鱼N 型乙酰胆碱(ACh)受体是由五条多肽链:α_2βγδ组成。这四种亚基构成一个离子通道。现已弄清这四个亚基的一级结构。当两个ACh 分子与α亚基的细胞外受点结合时,激活离子通道,完成一个快速的化学传递。哺乳动物其ACh 受体的生理特性随胚胎发育的进行而不同。在运动神经开始对肌肉支配之 Electric fish N-acetylcholine (ACh) receptor is composed of five polypeptide chain: α_2βγδ. These four subunits form an ion channel. It is now clear that the four subunits of the primary structure. When two ACh molecules bind to the extracellular site of the alpha subunit, they activate ion channels and complete a rapid chemical delivery. The physiological characteristics of mammalian ACh receptors vary with the development of the embryo. In the motor nerve began to dominate the muscles