Nucleic Acids Research, 6, 1817-1830 1979. After submission of this manuscript the authors learned new data on the physical maps of the rrnA and rrnE operons (deBoer et al., Cell in press). The rrnA map of deBoer et al, is consistent with that of the authors, but the rrnE map corresponds to the 7th column of Table II, and not to the 5th column. This assignment must thus be corrected. Accordingly, in the final map (Fig. 7) the fifth operon should be called rrnG (or F) and the seventh operon is rrnE. A further consequence of this correction is that the λaroE152 phage is a hybrid of operon rrnD and rrnE. deBoer et al. also detected the Hind III site at the 80th nucleotide of operons A and E, thus it is not a unique feature of rrnB, although it is certainly missing in rrnD.
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