Write a note on carrier protein.

Explanation

There are three types of carrier proteins classified on the basis of handling of molecules and direction of transport. They are i. Uniport, ii. Symport, iii. Antiport.
i. Uniport : In this molecule of a single type move across a membrane independent of other molecules in one direction.
ii. Symport or co-transport: The term symport is used to denote an integral membrane protein that simultaneously transports two types of molecules across the membrane in the same direction.
iii. Antiport of Counter Transport: An antiport is an integral membrane transport protein that simultaneously transports two different molecules, in opposite directions, across the membrane.