... ª 2009 FEBSMINIREVIEWProtein transport in organelles: Protein transport into and across the thylakoid membraneCassie Aldridge*, Peter Cain* and Colin RobinsonDepartment of Biological Sciences, ... proteinaceous insertion machinery. Other single-spanning proteins have also been suggested to use thismembrane integration route, including the photosys-tem II subunits, PsbW and PsbX. In describing ... vicinity ofthe twin arginine motif, whereas Hcf106 cross-linksless strongly to residues in the hydrophobic core and the early mature protein [32]. Binding of the precursorcan occur in the absence...