Abstract
Summary
1. In tryptic digestion the liberation of ammonia was due to an enzymic activity associated with the trypsin preparation used, whereas in peptic digestion the ammonia liberation was due to the acidity only. 2. The more rapid liberation at first in a pepsin digest than in the control can be explained on the basis of the physical atid chemical change in the substrate due to peptic proteolysis. 3. Kidney-extract did not hasten ammonia liberation. The aminolytic and amidolytic activity in the extract was high and seemed to follow the same course as with trypsin. 4. The concentration of antiseptic used under the conditions described did not retard either activity.
The author wishes to express her appreciation to Professor F. C. Koch for his helpful criticisms and suggestions.
Get full access to this article
View all access options for this article.