BN-PAGE followed by SDS-polyacrylamide gel for PSII complexes co-isolating with CP47-His from the PSI-less strain (A) and the PSI-less/SCP-less strain (B). The bands on BN-PAGE (top) are unstained and are colored by the native chlorophyll and Coomassie Brilliant Blue. The SDS-polyacrylamide gel was stained with Coomassie Brilliant Blue. RCC(2), mature PSII dimer; RCC-RC47, PSII dimer lacking CP43 in one of the monomers; RC47(2), PSII dimer lacking CP43 in both monomers; RCC(1), PSII monomer; and RC47(1), PSII monomer lacking CP43.