Schematic of a typical T3SS. A Schematic of the use of the bacterial type 3 secretion system. B Common organization and structure of the T3SS. The colors of the proteins correspond to the various areas of the T3SS. C Nomenclature of T3SS components displaying both the universal nomenclature and the corresponding protein on the SPI-1 T3SS. Reproduced with permission and minor modifications from Wagner et al. .