Electrophoretic analysis of the lactate dehydrogenase isozyme patterns of several tissues ofHeteropneustes fossilis andClarias batrachus indicated that in addition to the LDH A and B genes found in these species the liver tissue ofClarias batrachus also possesses a liver specific LDHC. gene.
The relative mobilities of the LDH-B4 and-A4 isozymes inHeteropneustes fossilis andClarias batrachus, are reversed. Further there are significant quantitative differences in the amounts of specific isozymes in homologous tissues of these two species and also in different tissues of a single species as documented in densitomeric tracings. The subunit composition of the LDH isozymes were confirmed by immunological procedures.