pro alpha 1 ( iii ) and pro alpha 1 ( iv ) collagen mrnas were present in plc/prf/5 , a hepatocellular carcinoma cell line , whereas pro alpha 1 ( i ) , pro alpha 2 ( i ) , pro alpha 1 ( iv ) and pro alpha 2 ( v ) collagen genes contrast , hepg2 cells derived from hepatoblastoma contained little , if any , mrnas for these types of procollagens we had examined .
C0009325
collagen
C0033235
procollagens