title: Lactate dehydrogenase activity and lactate/pyruvate ratio in muscle of thermally acclimated goldfish.
abstract: 1. Some glycolytic metabolites were determined for red muscle (RM) and white muscle (WM) of goldfish acclimated to 10 and 25 degrees C. 2. Lactate/pyruvate (L/P) was higher in RM than in WM. 3. Lactate dehydrogenase (LDH) of RM was slightly more susceptible to inhibition by lactate than WM-LDH. At L/P found in vivo under resting conditions, RM-LDH was about three times as inhibited as WM-LDH. 4. When 25 degrees C-fish were forced to swim at 25 degrees C, the increase of L/P in WM was mainly due to increased lactate level and that in RM was ascribed to decreased pyruvate level. These changes were obscure in 10 degrees C-fish.
mesh_terms: D000064:Acclimatization; D000818:Animals; D003530:Cyprinidae / Q000378:metabolism*; D006003:Glycogen / Q000032:analysis; D006054:Goldfish / Q000378:metabolism*; D007770:L-Lactate Dehydrogenase / Q000032:analysis*; D007773:Lactates / Q000032:analysis*; D019344:Lactic Acid; D009132:Muscles / Q000032:analysis*; D005082:Physical Exertion; D011773:Pyruvates / Q000032:analysis*; D019289:Pyruvic Acid
chemical_list: D007773:Lactates; D011773:Pyruvates; D019344:Lactic Acid; D019289:Pyruvic Acid; D006003:Glycogen; D007770:L-Lactate Dehydrogenase