Within eachsynapse is a set ofproteins, which, like the componentsof an engine, bindtogether tobuildamolecularmachinecalledthe postsynaptic density - also known as the PSD.
每个神经突触都有拥有一系列蛋白，它们像机器的零件一样，结合在一起，搭建出一个被称为突触后致密区(postsynaptic density PSD)的分子机器。