Table 4.

Proteins existing in more than 90% and less than 10% of genomes base on different set of reference genomes. (E-value 10^-5)

Reference genome	No. proteins appearing in <10%	No. proteins appearing in > 90%
Aerobic	1,297	455
All	1,034	289
High GC Gram positive	1,912	333
Low GC Gram negative	1,899	723
Motile	745	104
Proteobacteria	614	499
Selected	1,198	446