the optimum cleavage site for alpha-thrombin has the structures of ( a ) p4-p3-pro-arg-p1'-p2 ' , where p3 and p4 are hydrophobic amino acid and p1 ' , p2 ' are nonacidic amino acids and ( b ) p2-arg-p1 ' , where p2 or p1 ' are gly .
C0002520
amino acids
C0017890
gly