The genome of Rhizobium leguminosarum has recognizable core and accessory components

Table 6 Distribution and phylogeny of ABC transporter genes

	Transporter genes	Percentage of all genes	Number in quartops	Percentage in quartops	Phylogeny supported
					RA-SM^a	RS-AM	RM-AS
Chromosome	383	8.1	128	33.4	31	20	16
pRL12	172	21.7	12	7.0	0	9	0
pRL11	77	12.1	29	37.7	11	3	1
pRL10	83	18.0	8	9.6	5	1	0
pRL9	86	27.5	14	16.3	3	3	4
pRL8	15	10.6	0	0	0	0	0
pRL7	0	0	0	0	0	0	0
All	816	11.2	191	28.3	50	36	21

^aNumber of quartops supporting the 'core' phylogeny ([R. leguminosarum, A. tumefaciens], [S. meliloti, M. loti]) with at least 99% probability (and likewise for the other two possible topologies). ABC, ATP-binding cassette.

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