FIG. 1.

Aligned partial maps of the S. meliloti (S.m.) (36), R. lupini (R.l.) (this work) and A. tumefaciens (A.t.) (5) flagellar gene clusters. Solid lines signify fully sequenced genomic regions, and dashed lines signify partially sequenced genomic regions. Gene loci are not drawn to scale; relevant transcription units and their polarities are marked by small dashed arrows, and general transcription polarity is marked by large arrows. The nomenclature of the S. meliloti flaC and flaD genes (36) has been changed in accordance with their map order, and the R. lupini flaD gene has been named by analogy to its A. tumefaciens paralogue (5). An R. lupini flaC paralogue was not detected. R. lupini (and A. tumefaciens) genes translocated and inverted with respect to their positions on the S. meliloti map are connected by dotted lines.