L-amino acid oxidase

Ontogenetic Changes in the Properties of the Poisonous Secretion of Vipera renardi (Reptilia: Viperidae)

Authors: Atyasheva T. N.

The paper presents the results of our long-term (August 2014–October 2016) observations of changes in some properties of the poisonous secretion of eastern steppe vipers of the nominative subspecies Vipera renardi renardi (Christoph, 1861) during their postembryonic ontogenesis. The poisonous secretion of newborn vipers differed from the venom of adult snakes by an increased protease activity and the absence of any L-amino acid oxidase activity; all newborns had colorless venom.

VENOM’S YIELD AND VENOM’S PROPERTIES OF EASTERN STEPPE VIPER VIPERA RENARDI AT DIFFERENT TIMES OF ITS SEASONAL ACTIVITY

Authors: Malenyov A. L., Gorelov R. A., Atyasheva T. N., Bakiev A. G.

The venom yield of the eastern steppe viper Vipera renardi (Christoph, 1861) was shown to be higher in the summer than in the spring and autumn. No seasonal variability of the venom toxicity (the average lethal dose DL50 for banana crickets Gryllus locorojo Weissman et Gray, 2012) and the enzyme activities therein (proteases and L-amino acid oxidase) was detected.