Extended Data Fig. 2: Single-particle cryo- EM data processing of the stacked C2S2 supercomplex.
From: Structural insight into light harvesting for photosystem II in green algae

a, Overall scheme of the data processing. b, Cryo-EM densities of representative cofactors and four newly found small proteins associated with the C2S2-type PSII-LHCII supercomplex from C. reinhardtii. USP, unidentified stromal protein (the side chains for some residues are assigned tentatively according to the density features); SLP, small luminal protein tentatively assigned as a small domain of Psb27.