
Processing at site P can be bypassed. Total RNA from wild-type (WT) and xrn2 mutant plants was analyzed as described in Figure 4B. The names of the pre-rRNAs detected are given on the right. Note that the 35S and P–A3 pre-rRNAs are 5′ ETS extended in the xrn2 mutant (35S* and 5′ ETS–A3, respectively).










