residues 1-11 show extensive sequence homology with residues 137-147 and 242-252 in prothrombin , which are located in corresponding regions of the two internally homologous 83-residue structures in the non-thrombin part of the molecule , indicating that such structures may be a common feature of the non-protease part of the larger serine protease zymogens .
C0030946
protease
C0036734
protease