Fig. 2
From: Review on plant antimicrobials: a mechanistic viewpoint
Schematic representation of the main families of bacterial efflux pumps. The resistance- nodulation-division (RND) family, the small multidrug resistance (SMR) family, the major facilitator superfamily (MFS), the multidrug and toxic compound extrusion (MATE) family and the adenosine triphosphate (ATP)-binding cassette (ABC) superfamily