Fig. 3.
Enzymatic analysis of RNA Y and Z by 5′ end labelling. RNA were phosphorylated directly (lanes 1 and 3) or after a prior dephosphorylation (lanes 2 and 4); RNA Y (lanes 1 and 2) and RNA Z (lanes 3 and 4). Adjacent to the gel are the positions of RNA standards (length in nucleotides). ori, origin of migration; XC, position of xylene cyanol.