tsütoplasmavõrgustiku membraanis asuv karbohüdraatidele kinnituv tšaperoonvalk, mis seostub mittetäielikult pakitud valkudel olevate oligosahhariididega ning aitab hoida neid valke tsütoplasmavõrgustikus, Calnexin is a chaperone, characterized by assisting protein folding and quality control, ensuring that only properly folded and assembled proteins proceed further along the secretory pathway.