Seasonal variations in glycolysis in Mytilus galloprovincialis Lmk

Abstract

1. 1. In the hepatopancreas and mantle of the sea mussel Mytilus galloprovincialis Lmk glycolysis shows seasonal variations. 2. 2. In both these tissues, glycolytic activity shows a maximum in winter and a minimum in summer. 3. 3. Smaller fluctuations also take place in the posterior adductor muscle. 4. 4. In all three tissues, Fru 2,6-P 2 indicates the direction and strength of glycolysis, correlating well with other parameters such as energy charge or the phosphoenolpyruvate/pyruvate ratio. 5. 5. In the posterior adductor muscle, however, Fru 2,6-P 2 does not correlate with the MAR/K eq ratio from phosphofructokinase owing to the synergic activation of the enzyme by both Fru 2,6-P 2 and AMP.