Fig. 4.

Lipid molecules involved in the assembly of PsPSII core monomer. A The locations of Cluster 2, Site 1 and Site 2 lipid-binding regions within the PsPSII core momomer. B Lipid molecules at the peripheral Cluster-2 region of the PSII monomer. C The binding sites of two lipid molecules (SGD412 and LHG410) surrounded by D1, D2, PsbK and CP43 subunits at stromal side. D The binding sites of four lipid molecules (LMG521, DGD519, DGD520, LMG411) at the luminal side of Cluster 2. E Two lipid molecules (LMG413 and DGD518) at Site 1 nearby the interface between CP43 and PsbW. F A DGDG molecule (DGD102) on Site 2 surrounded by CP47, D2 and PsbH subunits. The hydrogen bonds and ionic interactions between lipid head groups and nearby amino acid residues are shown as dash lines