Abstract
1. In human gastric mucosa tryptase activity (pH 7.2-8.4, casein & gelatin) is surely present, but against it serum albumin and egg albumin are usually resistent.
2. Tryptase of human gastric mucosa may partially find itself in desmo-form and its activity remains also in the presence of not dialyzed serum albumin or egg albumin unaffected. The hydrolysis of gelatin seems to undergo some retardation in the presence of human serum but that ofcasein surely not. The tryptase activity is rather inhibited by cystein, but no effect of kinase activation is found.
3. Tryptase activity of human gastric mucosa undergoes activation in the presence of dialyzed albumin, with which such a protein as egg albumin or serum albumin comes to be hydrolyzed, though it is usually resistent to the tryptase activity.
