Table 1.

Orthologous gene classification

		Related to L. drancourtii			Related to P. acanthamoebae
Score	No. of genes	Legionella pneumophila	Coxiella burnetii	Escherichia coli	Protochlamydia amoebophila	Chlamydia trachomatis	Rhodopirellula baltica
0	20	0	0	0	0	0	0
1	27	15	0	8	4	0	0
2	37	28	16	10	12	0	8
3	59	52	27	41	32	6	19
4	77	76	60	62	58	16	36
5	80	80	71	74	79	54	42
6	208	208	208	208	208	208	208

This table indicates the total number of proteins with a score of 0 to 6 based on their presence in the six bacteria when using P. acanthamoebae or L. drancourtii orthologous proteins as queries for the BLASTP searches. The number of corresponding genes present in each bacterium is detailed in the following columns. The bacteria in the first three columns are decreasingly related to L. drancourtii, andthose indicated in the last three columns exhibit diminishing relatedness to P. acanthamoebae.