Erepsin is secreted by glands in the wall of the small intestine .
由小壁的泌的。
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Normally, trypsinogen isn't activated until it is cleaved by protease enteropeptidase which is found in the duodenum.
情况下,胰蛋白酶原在被二指肠中的肠肽酶切割会被激活。
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