Table 3. Summary Statistics for the Vir Genes Encoding the Rickettsia T4SS.

Vir	aa seqs			nt seqs
	div1	PI2	Tree3	div1	PI2	Tree3	GC4	ts/tv5	dN/dS6
D4	4.2	54	N	8.1	329	N	0.35	1.9	0.06
B4a	3.7	72	N	6.7	380	N	0.34	2.5	0.05
B4b	9.9	195	N	9.2	570	N	0.28	1.9	0.13
B11	4.8	33	N	9.7	186	N	0.37	1.9	0.06
B6a	14.7	374	N	12.8	1054	N	0.36	1.5	0.23
B6b	13.2	196	N	11.2	565	N	0.34	1.9	0.2
B6c	15.2	285	N	13.2	848	N	0.35	1.2	0.27
B6d	12.9	263	N	10.3	682	N	0.32	1.9	0.18
B6e	12.4	308	N	11.1	871	N	0.33	1.6	0.17
B8a	13.4	63	Y	10	163	N	0.26	1.7	0.26
B8b	9.4	55	N	9	161	N	0.31	1.3	0.13
B9a	4.7	27	N	7.6	130	N	0.35	1.8	0.06
B9b	10.8	43	N	8.2	98	N	0.26	2.5	0.14
B10	10.5	108	N	11	356	N	0.38	1.4	0.14
B3	4	8	N	6.2	43	N	0.31	1.4	0.1
B1	16.3	93	N	13.9	271	N	0.32	1.3	0.6
B2	11.6	35	N	10.5	104	N	0.32	1.9	0.26
B7	15.3	23	N	11	47	N	0.32	1.4	0.21

¹Avg. pairwise differences across all sequences divided by avg. sequence length.

²Number of parsimony informative characters.

³Tree corroborates (Y) or disagrees with (N) species tree. All trees are shown in Figure S4 .

⁴%GC of all codon positions.

⁵Ratio of transitions to transversions.

⁶Ratio of non-synonymous to synonymous substitutions.