in order to determine the sequence to which if3 may bind in vivo , samples of 5'-32p labelled 3 ' terminal 49-nucleotide fragment of 16s rna were incubated 5 min . at 37 degrees in 40 mm tris-hoac , ph 7.4 , 100 mm nacl , 1 mm mg ( oac ) 2 , 1 mm znso4 , with or without if3 , then reacted a further 5 min with nuclease s1 , rnase t1 , or rnase a .
C0018364
rnase t1
C0014241
rnase