Abstract: | It has been shown that in embryonic liver and kidney of chicks, serine is involved into gluconeogenesis almost exclusively via serine-pyruvate aminotransferase. This relationship stands true also for the liver of adult hens. On the contrary, in the kidney of adult hens, there is a significant increase in the activity of serine dehydratase, as compared to the level of the activity of this enzyme in embryogenesis and in the liver of adult hens. |