Figure 8

Proposed outer membrane transport of lignin-derived aromatic compounds in SYK-6. Outer membrane transport of GGE, PR, DCA, HMPPD, FA, VA, SA, and PCA is thought to be mediated by TBDTs, and the involvement of TonB1–ExbB1–ExbD1–ExbD2 as the Ton complex is strongly suggested. AV, VN, and SN are presumed to be taken up by transporters other than TBDT or passive diffusion. ExbB2/TolQ and ExbD3/TolR are the components of the Tol-Pal system that stabilizes the outer membrane structure. OM, outer membrane; IM, inner membrane. This figure was generated using Canvas X Draw version 7.0.2. (https://www.canvasgfx.com/products/canvas-x-draw).