pH值对星突江鲽消化酶活性的影响

Effect of pH on activities of digestive enzymes in platichthys stellatus

实验通过改变酶反应中的pH值,分析了星突江鲽蛋白酶、淀粉酶和脂肪酶的活性。结果表明,胃、肠和肝胰腺蛋白酶活性的最适pH值分别为3.8、8.2和7.8,各消化部位的最高点蛋白酶活性从高到低为:胃>肝胰腺>肠。胃、肠和肝胰腺淀粉酶活性的最适pH值分别为6.6、7.4和7.0,各消化部位的最高点淀粉酶活性从高到低为:肠>肝胰腺>胃。胃、肠和肝胰腺脂肪酶活性的最适pH值分别为7.4、7.8和7.8。各消化部位的最高点脂肪酶活性从高到低为:肝胰腺>肠>胃。

The research of the activity of protease,amylase and lipase with varying pH of enzyme reaction revealed that： the optimum pH of the protease activity in stomach,intestine and hepatopancreas is 3.8,8.2 and 7.8 respectively;the descending of the enzyme activity of protease in optimum pH is stomachhepatopancreasintestine.The optimum pH of the amylase activity in stomach,intestine and hepatopancreas is 6.6,7.4 and 7.0 respectively;the descending of the enzyme activity of amylase in optimum pH is intestinehepatopancreasstomach.The optimum pH of the lipase activity in stomach,intestine and hepatopancreas is 7.4,7.8 and 7.8 respectively;the descending of the enzyme activity of lipase in optimum pH is hepatopancreasintestinestomach.