A transport protein is a protein involved in facilitated diffusion. Changes in the conformation move the binding site to the opposite side of the protein.

There are 3 types of transport proteins, uniporter, symporter/coporter, and antiporter, which facilitate different modes of transport.

Transport proteins are also used in active transport. The proteins bind to the larger molecule needed within the cell and guide it into the cell, moving particles against the concentration gradient.

See also

• TC number (classification)

Biochemistry