3.4.22.14 P75Q the mutant shows reduced activity compared tot he wild type enzyme 718236 3.4.22.14 proteolytic modification the enzyme is secreted in an inactive form as zymogen, named actininidin, which has a MW of 39000 Da 81494 3.4.22.14 S68G inactive 718236 3.4.22.14 S68G/P75Q the mutant shows reduced activity compared tot he wild type enzyme 718236