[Biochemical and immunologic analysis of pepsinogen I in blood serum and mucosa in patients with gastric tumors and non-tumor diseases]. / Biokhimicheskii i immunologicheskii analiz pepsinogena I syvorotki krovi i slizistoi obolochki bol'nykh opukholevymi i neopukholevymi zabolevaniiami zheludka.

The results of the biochemical and immunologic studies of pepsinogen I (PG-I) occurring in the mucosa and blood serum of patients with tumors and non-tumor conditions of the stomach are discussed. Pepsinogen I was identified in human blood serum using rabbit antibodies against PG-I. Sharp drop in blood serum-PG-I level in patients with gastric tumors has been confirmed.