The functions of octopine dehydrogenase and D-lactate dehydrogenase in the pedal retractor muscle of thedog whelkNassarius coronatus(Gastropoda: Nassariidae)

✍ Scribed by J. Baldwin; A. K. Lee; W. R. England

• Publisher: Springer-Verlag
• Year: 1981
• Tongue: English
• Weight: 396 KB
• Volume: 62
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00397689

✦ Synopsis

The pedal retractor muscle ofNassarius coronatus, unlike most mollusc muscles, contains high activities of both octopine dehydrogenase (159 IU g-1 wet wt muscle) and D-lactate dehydrogenase (40 IU g-1 wet wt muscle). Pedal retractor muscles show accumulation of octopine (increase of 4.7/~mol g-1 wet wt muscle), and a fall in arginine phosphate concentration (decrease of 4.1 #mol g-t wet wt muscle) after exercise. During recovery from exercise, octopine returns to resting levels after about 120 min, D-lactate accumulates (5.1 #mol g-1 wet wt muscle), and arginine phosphate returns to resting levels within 30 min. D-lactate (2.0 #tool g-1 wet wt muscle) accumulates during long-term exposure to air. The results show that octopine dehydrogenase and D-lactate dehydrogenase can function to catalyze the terminal step of glycolysis during muscle anoxia associated with these different physiological states.