the if protein complement of trichocytes from all three species is characterized by a very similar set of eight highly conserved alpha-keratin polypeptides , comprising four members of the basic ( type ii ; mr 56,500-60,000 ) and four members of the acidic ( type i ; mr 41,000-44,000 ) cytokeratin subfamily .
C0021769
if protein
C0010803
cytokeratin