But while stomach acid is a factor, Dr. Koufman says, the real culprit for many patients is pepsin, a digestive enzyme that can exist in the esophagus.

但考夫曼博士指出，胃酸只是其中的一个因素，胃蛋白酶才是很多患者的症结所在，这是可以存在于食道的一种消化酶。

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More than that, the vaccin adopts a kind of dosage form by special process, which could overcome the destruction from gastric acidity or pepsin, thereby render the vaccin more effective and stabler.

其次，它采用特殊工艺剂型，克服了胃酸、胃蛋白酶对疫苗的破坏作用，提高了疫苗的有效性和稳定性。

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Being a small peptide molecule, protamine's basic structure can be destroyed and it's antimicrobial efficacy largely affected by some protein enzymes like chymotrypsin, trypsin, papain and pepsin.

鱼精蛋白是小分子肽，有些蛋白酶如胰凝乳蛋白酶、胰蛋白酶、木瓜蛋白酶、胃蛋白酶可分解它，使其一级结构受到破坏，从而影响它的抗菌活性。

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