Fig. 3

Small cell size of Patescibacteria superphylum and the simplified membrane structure. a Shows the maximum likelihood (ML) tree of the Patescibacteria superphylum and small- and large-cell OTUs (captured on 0.2- and 0.4-μm filters respectively) with other well-established bacterial phyla as references. b Shows the simplified membrane structures of Patescibacteria superphylum in comparison to the other phyla, including flagellum, transporters and two-component system. The color represents gene numbers which were linearly standardized [(X-min)/max] to 0-1 for each row