[The effect of pituitary injections on the isoenzyme composition of non-specific esterases in the tissues of the silver carp, Hypophthalmichthys molitrix].

Polyacrylamide gel electrophoresis reveals differences in the isoenzymic spectra of non-specific esterases from various tissues of H. molitrix. Hypophyseal injections result in changes of the isoenzymic spectra of all the tissues studied. The pattern of changes depends on the tissue examined. Some of the isoenzymes are resistant to hypophyseal injections, whereas the other ones undergo changes which depend on the dose of the hormone.