GENETIC, DEVELOPMENTAL AND COMPARATIVE-ANALYSIS OF LDH, MDH AND GPI ISOZYMES IN THE SHEEPSHEAD BREAM (DIPLODUS-PUNTAZZO GM)

1. 1. The pattern of expression of lactate dehydrogenase, malate dehydrogenase and glucosephosphate isomerase isozymes were investigated in both embryonic stages and differentiated adult tissues of Diplodus puntazzo. 2. 2. The patterns of this species were compared with those of two distantly related Sparidae species (Sparus aurata, D. sargus). 3. 3. Species-specific patterns were found in all protein systems. 4. 4. Differences in enzyme-locus expression were used to infer the extent of species divergence. 5. 5. Some locus expression diverged markedly among species, while other were preserved. 6. 6. Comparative analysis of the enzymes examined showed the existence of a taxonomic distance between these three Sparidae species. © 1990.