[The species specificity of fish and mammalian gonadotropic hormones].

Protein spectra of the hypophyses of fishes from various taxonomic groups obtained by disc electrophoresis in polyacrylamide gel exhibit high species specificity. By means of biological testing on the loach Misgurnus fossilis, zones of gonadotropic activity were obtained which differ in various species by the electrophoretic mobility. The mammalian gonadotropins obtained reveal lower electrophoretic mobility. The gonadotropins investigated significantly differ in their biological effect.