EN
The effect of the compound was studied in homogenates from Musca domestica L. Manometric and spectrophotometric methods were used to examine the rate with which cytochrome oxidase disappeared at various temperatures; the influence of gamma-HCH on the activity of cytochrome oxidase at various temperatures was examined; the effect of gamma-HCH on the activity of cytochrome oxidase was tested in homogenates from insects of varying age. Gamm-HCH at the concentration of 10⁻³, 10⁻⁴ and 10⁻⁵M was found to inhibit the activity of cytochrome oxidase regardless of the age of insects; the inhibition depends but slightly on the temperature. Saturated gamma-HCH solutions stimulate the activity of cytochrome oxidase in homogenates from M. domestica. Alfa-HCH isomer failed to affect the activity of the enzyme under analogous conditions.