The effect of egg incubation temperature on the activity of cytochrome oxidase and anionic ATPase in chicken ontogenesis

The short-term cooling of hen eggs under incubation was studied for its effect on the dynamics of the activity of cytochrome oxidase (CO) and anion ATPase in the brain and liver of 15- and 20-day hen embryos and 5-day chickens. The temperature fall in the embryonal period was established to stimulate the activity of bicarbonate-dependent ATPase in the brain and to suppress it in the liver tissue. The CO activity was also subjected to similar alterations.