title: Alpha-Glycerophosphate dehydrogenase (insoluble) and lactic dehydrogenase activities in the skeletal muscles of two insects.
abstract: The flight muscle preparations of the dragonfly Pantala flavescens and the aquatic beetle Cybister confusus showed extremely low levels of lactic dehydrogenase activity and high levels of alpha-glycerophosphate dehydrogenase (insoluble) activity. The activities of these two enzymes in the leg muscle of the beetle were approximately the same (1:1), but lactic dehydrogenase activity was several times higher than that in the flight muscles of both Insects. These results have been interpreted as indicating the high energy-yielding demands of the flight muscles during continuous sustained activity, while the leg muscles of the beetle which are involved in swimming activity derive their energy predominantly through anaerobic glycolysis.
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000201:enzymology; D005121:Extremities / Q000201:enzymology; D005993:Glycerolphosphate Dehydrogenase / Q000032:analysis*; D007313:Insecta / Q000201:enzymology*; D007770:L-Lactate Dehydrogenase / Q000032:analysis*; D009132:Muscles / Q000201:enzymology*; D010369:Pectoralis Muscles / Q000201:enzymology
chemical_list: D005993:Glycerolphosphate Dehydrogenase; D007770:L-Lactate Dehydrogenase