Glycolytic Enzymes in the Tissues of Three Species of Scallop (Bivalvia: Pectinidae)

Abstract

The maximal activities of 15 enzymes were compared in the striated and smooth adductor muscle, mantle muscle, foot, digestive gland, testis, and ovary of three species of scallops Chlamys nobilis, Pecten albicans, and Patinopecten yessoensis. The patterns of glycolytic enzyme activities in these three species of scallop were similar. However, the maximal activities of phosphofructokinase and malate dehydrogenase in the striated adductor muscle and octopine dehydrogenase in the striated and smooth adductor muscle differ significantly between species. All enzymes except for hexokinase were detected at the highest activity in the adductor muscle. In the striated muscle octopine dehydrogenase activity was highest among pyruvate reductases, followed by other opine dehydrogenases, D-lactate dehydrogenase. and L-lactate dehydrogenase. In these scallops phosphoenolpyruvate carboxykinase activity was very low compared with pyruvate kinase. Gonads and digestive gland showed fairly high activities of malate dehvdrosenase. asoartate aminotransferase. and alanine aminotransferase.