by this method , a subfamily of closely related cytokeratin polypeptides has been identified which comprises the relatively large ( greater than or equal to mol . wt . 52 500 in human cells ) and basic ( ph greater than or equal to 6.0 ) polypeptides but not the smaller and acidic cytokeratins .
C0010803
cytokeratin
C1179970
acidic cytokeratins