Hydrolases;
Acting on peptide bonds (peptidases);
Serine endopeptidases
Reaction(IUBMB)
Selective cleavage of -Arg98!Ile- bond in limulus proclotting enzyme to form active clotting enzyme
Comment
From the hemocyte granules of the horseshoe crabs Limulus and Tachypleus. Factor B is activated by limulus clotting factor _overbar_C_. In peptidase family S1 (trypsin family)