Fig. 4: Interactions within the LH1 ring and between the RC and LH1 ring.

A Hydrogen bond interactions within an LH1 subunit. B Intra- and inter-subunit hydrogen bonds within three LH1 αβ-subunits. C Hydrogen bond interactions between RC and LH1.

A Hydrogen bond interactions within an LH1 subunit. B Intra- and inter-subunit hydrogen bonds within three LH1 αβ-subunits. C Hydrogen bond interactions between RC and LH1.