highly purified influenza b/lee/40 and b/rome/1/67 virus preparations have rna-dependent rna polymerase activity equivalent to the incorporation of 100 and 30 pmol , respectively , of ( 3 ) h-ump per mg of virus protein per h at 37 c , which is demonstrated only in detergent-treated virus suspensions .
C0042736
virus protein
C0042776
virus