FIG. 2.
Secondary structures of variable regions in the rrl genes from E. coli strains. The numbers indicate positions reported by Brosius et al. (3). Conserved nucleotides are in boldface. In parentheses are the nucleotides that have been determined in the rrl genes of the following strains: helix 25, (U)1 in rrlH of ECOR 40, (U)2 in rrlB, rrlC, rrlE, and rrlG of ECOR 35, and a (U)3 insertion in rrlB, rrlC, and rrlD of ECOR 24 and rrlG of A8190; helix 45, (G)1 in rrlB, rrlG, and rrlH of ECOR 10 and rrlB, rrlC, and rrlD of ECOR 24, (U)2 in rrlC of ECOR 24; and (G)3 in rrlA and rrlC of A8190; helix 63, (A)1 in rrlC of ECOR 40 and (U)2 in rrlB and rrlC of ECOR 10 and rrlB, rrlC, and rrlD of ECOR 24; helix 79, (G)1 in rrlA, rrlC, rrlD, and rrlE of ECOR 52 and (G)2 and (G)3 in rrlB and rrlC of ECOR 10 and rrlA, rrlC, and rrlG of A8190; helix 98, (A)1 in rrlC of A8190 and (G)2 in rrlA and rrlE of ECOR 52.