Ornithine-Urea Cycle Enzymes in the African Lungfish, Protopterus aethiopicus
- 15 April 1966
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 152 (3720), 358-359
- https://doi.org/10.1126/science.152.3720.358
Abstract
The presence of all five enzymes of the ornithine-urea cycle has been demonstrated in the liver of the African lungfish Protopterus aethiopicus. Levels of activity of the rate-limiting enzymes, carbamoyl phosphate synthetase and argininosuccinate synthetase, are similar to those in the premetamorphic tadpole of Rana catesbeiana and considerably lower than the levels reported for other ureotelic animals. They are thus consistent with the predominantly ammonotelic metabolism of the lungfish in an aquatic environment.Keywords
This publication has 12 references indexed in Scilit:
- Ornithine Carbamoyltransferase in Liver of the Dipnoan Protopterus aethiopicusScience, 1965
- The role of uricolysis in the production of urea by fishes and other aquatic vertebratesComparative Biochemistry and Physiology, 1965
- Ammonia excretion in the neotenous newt, Necturus maculosus (rafinesque)Comparative Biochemistry and Physiology, 1964
- The metabolism of the aestivating African lungfishComparative Biochemistry and Physiology, 1964
- Comparative studies of waste nitrogen metabolism in AmphibiaBiochemical Journal, 1962
- Comparative biochemistry of urea synthesis. 3. Activities of urea cycle enzymes in various higher and lower vertebratesBiochemical Journal, 1960
- Comparative Biochemistry of Urea SynthesisPublished by Elsevier BV ,1959
- Comparative Biochemistry of Urea SynthesisPublished by Elsevier BV ,1959
- The metabolism of the lung‐fish. I. General considerations of the fasting metabolism in active fishJournal of Cellular and Comparative Physiology, 1935
- Untersuchungen uber die Harnstoffbildung im TierkörperHoppe-Seyler´s Zeitschrift Für Physiologische Chemie, 1932