本酶催化的反应为Hydrolysis Of The Inner Layer Of Fish Egg Envelope. Also Hydrolysis Of Casein And Small Molecule Substrates Such As Succinyl-Leu-Leu-Val-Tyr!7-(4-Methyl)coumarylamide,已知来自硬骨鱼青鳉(Oryzias latipes)。卵膜的高效溶解需要与choriolysin H协同作用。一种24 kDa的肽酶,属于肽酶家族M12(astacin家族)。