Abstract
An electrophoretic investigation of the lactate dehydrogenase isozymes in twelve euteleostean species was conducted. Expression of the LDH-C locus and association of the A and B subunits in these fishes is discussed. InChanos chanos this locus is found prevalent in the liver suggesting a close relation to otophysans. Presence of four iso-spaced A-B polymers in this species is a character different from otophysans which are provided with five iso-spaced A-B tetramers. Absence of tissue specificity of C4 band in all holocentrid species suggests a possible primitive phylogenetic status of this family in the Beryciformes. However, expression of the LDH-C locus provides no strong evidence for the resolution of the phylogenetic positions of the Polymixiidae and the other groups examined.
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