Urea cycle enzymes in the liver of a dolphin Platanista indi

Urea cycle enzymes are all shown to be active in dolphin liver. Acetylglutamate-independent cytoplasmic carbamylphosphate synthase is also present. Arginase is a basic protein, although less markedly basic than the dog enzyme. It is 118 per cent activated by heating at 50 degrees. Optimum pH is 10.5...

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Bibliographic Details
Published in:	The Italian journal of biochemistry Vol. 25; no. 3; p. 219
Main Authors:	Grillo, M A, Sisini, A
Format:	Journal Article
Language:	English
Published:	Italy 01-05-1976
Subjects:	AMP Deaminase - metabolism Animals Arginase - metabolism Argininosuccinate Lyase - metabolism Argininosuccinate Synthase - metabolism Aspartate Aminotransferases - metabolism Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing) - metabolism Cytosol - enzymology Dolphins - metabolism Humans Liver - enzymology Mitochondria, Liver - enzymology Ornithine Carbamoyltransferase - metabolism Perissodactyla Rats Species Specificity Urea - metabolism
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Summary:	Urea cycle enzymes are all shown to be active in dolphin liver. Acetylglutamate-independent cytoplasmic carbamylphosphate synthase is also present. Arginase is a basic protein, although less markedly basic than the dog enzyme. It is 118 per cent activated by heating at 50 degrees. Optimum pH is 10.5. Co++ and Ni++ inhibit the enzyme. AMP deaminase, glutamicoxaloacetic transaminase, glutamate dehydrogenase and ornithine transaminase are also active in dolphin liver.
ISSN:	0021-2938