A Cellular Transport Process in Which Transported Substances Are Moved in Membrane Bounded Vesicles; Transported Substances Are Enclosed in the Vesicle Lumen or Located in the Vesicle Membrane. the Process Begins with a Step That Directs a Substance to the Forming Vesicle and Includes Vesicle Budding and Coating. Vesicles Are Then Targeted to and Fuse with an Acceptor Membrane.
Any of Several Different Proteinaceous Coats That Can Associate with Membranes. Membrane Coats Include Those Formed by Clathrin Plus an Adaptor Complex the Copi and Copii Complexes and Possibly Others. They Are Found Associated with Membranes On Many Vesicles As Well As Other Membrane Features Such As Pits and Perhaps Tubules.