Characteristics of proteolysis in the gastrointestinal tract in the early postnatal period

The activity of proteinases was increased, when we used experimental casein for artificial feeding of newborn rats. Control casein contained in milk substitutes delayed protein evacuation from the stomach. The activity of intestine pancreatic proteinases was increased when we used experimental casein and decreased, for control casein. When the activity of pancreatic proteinases increased, lysosomal intestine activity decreased.