It's either a passive or active transport.
Did NaCl require a transport protein for diffusion?
In primary active transport, the transport protein gets phosphorylated; in secondary active transport, the transport protein is not phosphorylated
Active transport occurs through carrier proteins that pump molecules against their concentration gradient using energy from ATP. These carrier proteins undergo conformational changes to transport molecules across the cell membrane.
passive transport
a protein is too big to enter a cell on its own, therefore it requires carriers in order to do so. the carriers transport the protein in/out of the cell.
carrier protein
transport protein
selective transport is the transport of specific substances by means of protein channels and pumps.
substance to pass
They are two major active transport proteins.
yes they can
Endoplasmic Reticulum.