Investigations of the anaerobic metabolism of the polychaete wormNereis diversicolor M. |
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Authors: | Udo Schöttler |
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Institution: | (1) Lehrstuhl für Tierphysiologie, Zoologisches Institut der Universität Münster, Hindenburgplatz 55, D-4400 Münster, Germany |
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Abstract: | Summary The anaerobic metabolism ofNereis diversicolor M. was studied during various periods of experimental anaerobiosis.The degradation of glycogen is shown to be the main source of anaerobic energy production. During first hours of anaerobiosis, aspartate, in addition to glycogen, is metabolized in considerable quantities.Five acids were found to accumulate as end-products: alanine, D-lactate, succinate, acetate and propionate (Table 2).Alanine is accumulated only during the first hours of anaerobiosis. The increase in alanine is correlated with a decrease in aspartate.D-Lactate is the main end-product during the first 24 h of anaerobiosis, and continues to be produced even during prolonged anaerobiosis. In accordance with lactate production,Nereis diversicolor possesses a high glycolytic capacity (Table 4).The major end-products of long term fermentation are propionate and acetate. In contrast to other end-products, these acids are excreted in substantial amounts.Abbreviations GAPDH
glyceraldehydephosphate dehydrogenase, EC 1.2.1.12
- LDH
lactate dehydrogenase, EC 1.1.1.27
- GOT
aspartate aminotransferase, EC 2.6.1.1
- GPT
alanine aminotransferase, EC 2.6.1.2
- MDH
malate dehydrogenase, EC 1.1.1.37
Supported by Deutsche Forschungsgemeinschaft (Gr 456/5 and Gr 456/6) |
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