Fig. 1

Histograms of protein lengths of Coxiella burnetii (a), Mycobacterium leprae (b), Chlamydia trachomatis (c), Rickettsia prowazekii (d) and all other prokaryotes (e) and (f) tested in this study. The X axis corresponds to the protein length intervals (0 -- (0100], 100-- (100,200], etc.), while the Y axis show the relative frequency of ORFans and HHPs among the genomes. Bar plot and the relative frequency plot with a smaller bin size for all prokaryotes are presented on Panels (e) and (f), respectively