Protein-encoding genes on the chromosome and six plasmids of Rlv3841, showing their nucleotide composition. GC3s (G+C content of silent third positions of codons) is a sensitive measure of composition. Symbols indicate whether each gene encodes a quartop protein (with orthologs in A. tumefaciens, S. meliloti, and M. loti) and, if so, which phylogenetic topology it supports (RA-SM denotes the tree that pairs R. leguminosarum with A. tumefaciens, and S. meliloti with M. loti; RM-AS and RS-AM are similarly defined). In addition, the nodulation genes nodOTNMLEFDABCIJ are identified on pRL10. Rlv3841, R. leguminosarum biovar viciae strain 3841.