Abstract

Barrett J. 1973. Nucleoside triphosphate metabolism in muscle tissue of Ascaris lumbricoides (Nematoda). International Journal for Parasitology 3: 393–400. Nucleosidediphosphate kinase and adenylate kinase were found to be extremely active in Ascaris muscle. Apart from adenylate kinase, no other nucleosidemonophosphate kinases could be detected. There was no measurable AMP deaminase activity or arginine or creatine phosphokinase activity in Ascaris muscle. Analysis of perchlorate extracts of freeze clamped Ascaris muscle revealed no arginine or creatine phosphate and negligible amounts of acid labile phosphate. Adenosine tri-, di- and monophosphates were the major nucleotides, constituting 93 per cent of the total, with only small amounts of inosine and guanosine di- and triphosphates being detected. The significance of these results in the energy metabolism of Ascaris muscle is discussed.

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