COPII

COPII is a cellular transport system that helps move proteins from the endoplasmic reticulum (ER) to the Golgi apparatus, a key step in processing and sorting proteins. It consists of a set of specialized proteins that assemble into a coated vesicle—think of it as a tiny bubble—that pinches off from the ER, carrying important molecules to their next destination. This process ensures proteins are correctly processed, modified, and dispatched within the cell, playing a critical role in maintaining proper cell function and communication.