Dr. Murai Éva szerk.: Parasitologia Hungarica 14. (Budapest, 1982)

HUMMEL, B.C.W. (1959): A modified spectrophotometric determination of chymotrypsin, trypsin, and thrombin. - Can. J. Biochem. Physiol., 37: 1393-1399. JUHÁSZ, S. (1979a): Proteolytic enzymes and enzyme inhibitors in Ascaris suum

. I. Proteolytic enzymes and enzyme inhibitors in the gut. - Acta. vet.hung.

, 27: 83-87. JUHÁSZ, S. (1979b): Studies on the nature of the protease inhibitor of Ligula intestinalis. - Helminthologia, 16: 293-298. JUHÁSZ, S. (1980): Protease inhibitor activity in extracts of Paramphistomum daubneyi. - Helminthologia, ÍJ: 301-303. JUHÁSZ, S. - KASSAI, T. (1981): A protease inhibitor of Nippostrongylus brasiliensis

. - Molecular and Biochemical Parasitology, 3: 83-90. KASSEL, B. (1970): Proteolytic enzyme inhibitors from Ascaris lumbricoides

. In: Methods in Enzymologyl_9. (Edited by PERLMANN, G.E. - LORÁND, L.), pp. 872-883. Academic Press - New York - London. KLIMENKO

, V.V. - KENINA, V.A. (1971): The role of phylogeny and ecology in certain biochemical adaptation mechanisms of helminths (in Russian). - Izv. Akad. Nauk Latvijskoj SSR, llj 93-96. NÉMETH, I. - JUHÁSZ, S. - BAINTNER, K. (1979): A trypsin and chymotrypsin inhibitor from Taenia pisiformis. - J. Parasit., 9: 515-522. SCHWERT, G.W. - TAKENAKA, Y. (1955): A spectrophotometric determination of trypsin and chymotrypsin. ActaBiochim. Biophys. 16: 570-575. Received: 28 May, 1982 Dr. JUHÁSZ, S. Research Institute for Veterinary Sciences, Hungarian Academy of Sciences, H-1143 Budapest

, Hungária kr t. 21. HUNGARY