Gonadotropic peptides are a new generation of peptide hormone regulators of methamorphosis and reproduction of insects. These substances have been isolated from ovarian, oviduct or brain of insects. The subject of this paper is a several insect gonadotropic peptides which: -stimulate ovarian growth, -modulate biosynthesis of trypsine, -speed up vitellogenesis, -stimulate ecdysteroid production, -inhibit serine proteases, -have other activities. Basing on the literaturę data and results of our investigations their structure and biological properties are presented.
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