PG I(同工酶375-42)主要由胃底粘膜的主要細胞分泌,而PG II(同工酶1-5)由幽門腺和十二指腸近端粘膜分泌。 Precursor reflects numbers of stomach surface cells as well as glandular cells, and monitors gastric atrophy indirectly.前體反映胃表面細胞和腺細胞的數量,並間接監測胃萎縮。 They are also extraordinarily stable because they perform their jobs under the harsh conditions present in the digestive system.它們也非常穩定,因為它們在消化系統中存在的惡劣條件下執行工作。 The atrophy of the corpus mucosa leads to low synthesis of pepsinogen I and hence its low release into the serum.體粘膜的萎縮導致胃蛋白酶原I的合成減少,因此其在血清中的釋放也較低。 Serum pepsinogen I indicates function and states of gastric mucosa.血清胃蛋白酶原I指示胃粘膜的功能和狀態。