Optimum pH 5.6.Adaptive range of S1 AMY which is endemic in China for temperature and pH value are wide,and activity under low and high temperature as well as strong alkali conditions is higher than that of imported species.

• 最适值均为pH5.；6。 我国特有的S1AMY对温度和pH适应范围宽；且在低温、高温、强酸和强碱下的活性比引进种的高。