Transaminase and phosphomonoesterase activities in different regions of the oviduct epithelium of laying Japanese quail (Coturnix coturnix japonica).

1. Activities of alkaline (ALP) and acid phosphomonoesterases (ACP) and aspartic (GOT) and alanine (GPT) aminotransferases in the glandular epithelia of the infundibulum, magnum, isthmus and shell gland of the laying quail were measured when the egg was in the shell gland. 2. The activities of all the enzymes were significantly (P less than 0.001) greater in shell-gland than in isthmus and magnum. 3. Gel-electrophoretic analysis of proteins showed that the magnal epithelia had the same proteins as the albumen of the laid egg.