SOME ASPECTS OF THE BEHAVIOUR 

 OF NUCLEAR RNA AND PROTEIN 



J. L. SIRLIN, K. KATO and K. W. JONES 



Institute of Animal Genetics, West Mains Road, Edinbur^ 9 



The turn-over of nucleic acids precursors offered in vitro into both trans- 

 fer RNA and higher molecular weight RNA in the salivary gland nucleus 

 of the chironomid Smittia will be described as revealed by autoradiogra- 

 phy. Similarly, the turn-over of Eunino acid into both transfer RNA and 

 protein will be described. With thèse observations some aspects of the 

 participation of the varions nuclear components in the System for protein 

 synthesis of the cell will be discussed. 



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