COMPARATIVE-STUDY OF OVOMUCOID ISOLATED FROM MUSCOVY DUCK (CAIRINA-MOSCHATA), DOMESTIC GOOSE (ANSER ANSER) AND DOMESTIC DUCK (ANAS-PLATYRHYNCHOS)

1. Ovomucoids were purified from Muscovy duck, domestic duck and domes tic goose. 2. Peptide maps of cyanogen bromide-cleaved ovomucoids from Muscovy duck and domestic duck were very similar to one another, but differed from that of goose. 3. Muscovy duck ovomucoid showed the same protease inhibitory pattern as ovomucoid from domestic duck, inhibiti ng trypsin in the molar ratio of 1:2 and chymotrypsin I:l. 4. Inhibito ry complexes could be detected between chymotrypsin and ovomucoid from both Muscovy and domestic duck, but not from goose, by using non-dena turing gels. 5. No complexes could be detected between DFP-inactivated chymotrypsin and any of the ovomucoids. 6. The results show that of o vomucoid from Muscovy duck more closely resembles that from domestic d uck than goose.