studies of the synthesis of viral ribonucleates and polypeptides in cells infected with two rna- ts mutants of mengo virus ( ts 135 and ts 520 ) have shown that when ts 135 infected cells are shifted from the permissive ( 33 degrees c ) to the nonpermissive ( 39 degrees c ) temperature : ( i ) the synthesis of all three species of viral rna ( single stranded , replicative form , and replicative intermediate ) is inhibited to about the same extent , and ( ii ) the posttranslational cleavage of structural polypeptide precursors a and b is partially blocked .
C0035668
rna
C0035736
viral rna