[Enzymes of the pentosephosphate pathway in the tissues of cyclostomes at different stages of ontogenesis].

Studies have been made on the activity of the enzymes of pentose phosphate shunt in the heart, liver and somatic muscles of two lamprey species, Lampetra fluviatilis and L. planeri, at various stages of ontogenesis. It was shown that the activity of these enzymes in larval tissues is significantly higher than in adult lampreys. In adult animals, the enzymes investigated exhibit low tissue specificity.