[Isoenzymic spectra of lactate dehydrogenase and malate dehydrogenase in the loach unfertilized eggs and embryos].

Isoenzymic spectra of lactate dehydrogenase and malate dehydrogenase were detected in unfertilized eggs of Misgurnus fossilis. They do not change significantly in the embryos during blastula, gastrula and early organogenesis stages of development. The intraspecific polymorphism of one lactate dehydrogenase subunit was found in the unfertilized eggs and embryos. The polymorphism is pronounced in the existence of three types of isoenzymic spectra of different frequencies in the given population of the loach.