Comparison of the region from bp 1041 to 1191 of irp1 in Y. enterocolitica 8081, Y. enterocolitica WA-CS (I), Y. pestis KUMA, Y. pestis KIM, Y. pseudotuberculosis 346, Y. pseudotuberculosis PB1, and E. coli Phi (II). Nonmatching bases are boldfaced and underlined.