3.4.21.85 Benzoyl-Ser-Ser-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15767 3.4.21.85 Benzoyl-Ser-Thr-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15766 3.4.21.85 Benzoyl-Thr-Ser-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15768 3.4.21.85 Benzoyl-Thr-Thr-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15765 3.4.21.85 Limulus proclotting enzyme + H2O - Tachypleus tridentatus Active clotting enzyme - ? 15759 3.4.21.85 additional information 3 protease zymogens, factor C, factor B, and proclotting enzyme are required for the sequential activation of the limulus clotting system. Factor B is activated by factor C (sensitive to lipopolysaccharide) and the resulting factor B activates proclotting enzyme to the clotting enzyme Tachypleus tridentatus ? - ? 89 3.4.21.85 N-tert-Butoxycarbonyl-Met-Thr-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15760 3.4.21.85 tert-butoxycarbonyl-Asp-Pro-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15756 3.4.21.85 tert-butoxycarbonyl-Gln-Arg-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15763 3.4.21.85 Tert-Butoxycarbonyl-Leu-Thr-Arg 4-methylcoumarin 7-amide + H2O - Tachypleus tridentatus ? - ? 15764 3.4.21.85 Tert-Butoxycarbonyl-Val-Pro-Arg-4-methylcoumaryl-7-amide + H2O - Tachypleus tridentatus ? - ? 15761