CSF-103-Edited__1_

rotini molecules are classified into two categories : 1. Integral proteins or transmembrane proteins .2. Peripheral proteins or peripheral membrane proteins. 1. Integral proteins:Integral or transmembrane proteins are the proteins that pass through entire thickness of cell membrane from one side to the other side. These proteins are tightly bound with the cell membrane .Examples of integral protein :a) Cell adhesion proteins.b) Cell junction proteins.c) Some carrier (transport) proteins.d) Channel proteins.e) Some hormone receptors’) Antigens’) Some enzymes .2. Peripheral proteins:Peripheral proteins or peripheral membrane proteins are the proteins which are partially embedded in the outer and inner surfaces of the cell membrane and do not penetrate the cell membrane. Peripheral proteins are loosely bound with integral proteins or lipid layer of cell membrane. So, these protein molecules dissociate readily from the cell membrane .Examples of peripheral proteins :a) Proteins of cytoskeleton.b) Some carrier (transport) proteins.