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Reexamination of metabolic potential in the toadfish sonic muscle

✍ Scribed by Walsh, Patrick J. ;Bedolla, Cindy ;Mommsen, Thomas P.

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 375 KB
Volume: 241
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1402410116

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✦ Synopsis

Activities of eight enzymes were measured in the sonic muscle of the gulf toadfish, Opsanus beta, to determine the metabolic poise of this unique tissue and to evaluate potential sex related differences in metabolism.

In contrast to a prior study (Pennypacker et al., '85, J. Exp. Zool., 239: 259-264), we observed substantial activities of M4-lactate dehydrogenase, 333 to 482 unitslg wet sonic muscle weight. This observation and the presence of high activities of other enzymes of glycolytic and anaerobic metabolism (pyruvate kinase and creatine phosphokinase) lead us to conclude that #is tissue has high anaerobic capacity. Also in contrast to the observations of Pennypacker et al. ('85), we found that the activities of some enzymes indicative of aerobic

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