using the northern blot hybridization technique , it was shown that at the restrictive temperature two rna 1 mutants , bts 03 and bts 04 , and two rna 2 mutants , mts 03 and mts 04 , were all defective in the synthesis of viral minus-strand rna , whereas the synthesis of the plus-strand genomic rnas 1 , 2 , and 3 and the subgenomic coat protein messenger , rna 4 , was relatively unimpaired .
C0035736
viral
C0035668
rna