COPI (Coat Protein I)

Coat Protein I (COPI) is a type of protein found in cells that plays a crucial role in transporting materials within the cell. It helps form vesicles, which are small, bubble-like structures that carry proteins and lipids from one part of the cell to another, particularly from the Golgi apparatus back to the endoplasmic reticulum. This process is essential for maintaining the cell's function and organization. By ensuring that the right materials are sent to the right places, COPI helps cells operate efficiently and adapt to their needs.