Cystatin D Proteins and Enzymes

Cystatin D is a member of family 2 of the cystatin superfamily. In contrast to other members of family 2, Cystatin D has restricted tissue distribution and has been found only in saliva and tears. Two allelic variants (Arg-46 and Cys-46) are known in the human protein and they are not significantly different in their inhibitory activity against pap...