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NeuroendocrinologyİLetters
ISSNİ0172ñ780X Copyrightİ©İ1998 NeuroendocrinologyİLetters

NEL VOL. 19 No. 1
ORIGINAL ARTICLE

1998; 19:39-42

 

Activities in the Early and Late Development of the Chick Embryo
by Auxiliadora Espinar, Juan M. Guerrero & Carmen Osuna


Abstract:

In this paper, we studied the characteristics of N-acetyltransferase (NAT) in the retina of chick embryos on the day 8 and 18 of development. Biochemical properties of the enzyme on day 8 are similar to those of the enzyme on day 18. Thus, dependence on protein concentration, pH, temperature, and Km exhibited similar values. The only difference found was the regulation by lighting conditions. While retinal NAT on day 8 is not affected by light exposure, the enzyme on day 18 is significantly depressed by light.

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