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. Author manuscript; available in PMC: 2017 Dec 15.
Published in final edited form as: Bioorg Med Chem. 2016 Sep 21;24(24):6370–6378. doi: 10.1016/j.bmc.2016.09.048

Figure 3.

Figure 3

Sec-independent secretion systems. Components of the secretion machinery that require SPase for processing are highhlighted in yellow and labeled. Grey components lack identifiable type I signal peptides. VirB9 forms a complex with VirB7 (not labeled). The T6SS is the only identified system without a component that depends on SPase. Detailed discussion of the structure and biogenesis of these secretion systems can be found elsewhere.39,158–160 HM: host membrane; OM: outer membrane; CM: cytoplasmic membrane.