PMID- 6208868 OWN - NLM STAT- MEDLINE DCOM- 19841220 LR - 20190908 IS - 0003-9799 (Print) IS - 0003-9799 (Linking) VI - 92 IP - 2 DP - 1984 Aug TI - Metabolic differentiation of homologous leg muscles of two aquatic birds at the level of enzymatic organization. PG - 65-72 AB - The quantitative determination of succinic dehydrogenase (SDH), hexokinase (HK), phosphorylase, phosphofructokinase (PFK), glycerol-3-phosphate dehydrogenase (G-3-PDH) and lactate dehydrogenase (LDH) was carried out in the homologous leg muscles of two aquatic Birds. It appears that the leg muscle fibres of the coot, a surface swimmer are more oxidative in nature and appear to utilize glucose as source of energy. The leg muscles of the dabchick, a diving Bird, on the other hand, seem to depend on glycogen as source of energy. The relative activity levels of HK, phosphorylase and PFK support the accepted role of glycogen as primary substrate of carbohydrate catabolism in the leg muscles. The ratio of G-3-PDH/LDH in the leg muscles revealed that glycerol 3-phosphate cycle appears to be insufficient to account for the major part of NADH oxidation. However, the LDH activity is quite high in all the muscles. These results led us to believe that glycerol 3-phosphate cycle may function during rest, when the rate of glycolysis will be low. FAU - Deshpande, B R AU - Deshpande BR FAU - Kallapur, V L AU - Kallapur VL FAU - Venkatesh, K AU - Venkatesh K LA - eng PT - Journal Article PL - Belgium TA - Arch Int Physiol Biochim JT - Archives internationales de physiologie et de biochimie JID - 0405355 RN - EC 1.1.- (Glycerolphosphate Dehydrogenase) RN - EC 1.1.1.27 (L-Lactate Dehydrogenase) RN - EC 1.3.99.1 (Succinate Dehydrogenase) RN - EC 2.4.1.- (Phosphorylases) RN - EC 2.7.1.1 (Hexokinase) RN - EC 2.7.1.11 (Phosphofructokinase-1) SB - IM MH - Animals MH - Birds/*physiology MH - Glycerolphosphate Dehydrogenase/analysis MH - *Glycolysis MH - Hexokinase/analysis MH - L-Lactate Dehydrogenase/analysis MH - Muscles/*enzymology MH - Phosphofructokinase-1/analysis MH - Phosphorylases/analysis MH - Succinate Dehydrogenase/analysis MH - Swimming MH - Tissue Distribution EDAT- 1984/08/01 00:00 MHDA- 1984/08/01 00:01 CRDT- 1984/08/01 00:00 PHST- 1984/08/01 00:00 [pubmed] PHST- 1984/08/01 00:01 [medline] PHST- 1984/08/01 00:00 [entrez] AID - 10.3109/13813458409071128 [doi] PST - ppublish SO - Arch Int Physiol Biochim. 1984 Aug;92(2):65-72. doi: 10.3109/13813458409071128.