1. Clathrin: Forms the triskelion structure that assembles into the lattice coating the vesicle. 2. Adaptor Proteins (AP2): Recognize cargo and recruit clathrin to the membrane. 3. Dynamin: A GTPase responsible for severing the vesicle from the plasma membrane. 4. Auxilin and Hsc70: Facilitate the uncoating of clathrin from the vesicle.