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Science 6 November 1964:
Vol. 146. no. 3645, pp. 794 - 795
DOI: 10.1126/science.146.3645.794
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Articles

Actinomycin and Puromycin: Effects on Sequential Gene Activation by Ecdysone

Ulrich Clever 1

1 Department of Biological Sciences, Purdue University, Lafayette, Indiana

A temporary inhibition of RNA synthesis leads to a corresponding delay in the formation of all puffs which are stimulated by ecdysone in the salivary gland chromosomes of Chironomus tentans. Inhibition of protein synthesis does not influence the induction of those puffs which appear shortly after injection of ecdysone. Puffs which develop after a longer period are delayed in appearance. It is concluded that early reacting genes are involved in those processes leading to the sequential activation of the puffs which appear later.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)