INTERVENTION OF RNA IN LIVING CELLS 33 



p j-,^.;.^ .c ..^^ ;^|gf_ . .^«*^^^^ ^X 



'z^-Mk'Mf;' 









«... -**#-<* - A-l^. 





* J ' * ^ 



Fig. 11. Incorporation of ^^C-phenylalanine in normal onion roots 



(Brachct, 1954). 



^ 



M 



*f- ^ •^' ***** "^ . 



Fig. 12. Incorporation of ^^C-phenylalanine in ribonuclease-treated onion roots 



(Brachet, 1954). 



References p. 50/54 



