urokinase [ ec 3.4.99.26 ] , reptilase , collagenase [ ec 3.4.24.3 ] , elastase [ ec 3.4.21.11 ] , alpha-chymotrypsin [ ec 3.4.21.1 ] , nagarse [ ec 3.4.21.14 ] , and stem bromelain [ ec 3.4.22 4 ] did not convert prekallikrein to kallikrein .
C0033024
prekallikrein
C0022478
kallikrein