Analysis of the NDH-1 complex in different NDH-1 mutant backgrounds. A, Immunoblot analysis of Ndh subunits in thylakoid membranes of wild-type, ndhM, ndhN, ndhO, ndhH, and ndhJ deletion mutants. Each lane was loaded with thylakoid membrane proteins corresponding to 2 μg chlorophyll a, and the series of dilution is indicated. In the lower panel, a replicated gel stained with Coomassie Brilliant Blue (CBB) was used as a loading control. B, BN-PAGE analysis of thylakoid protein complexes isolated from wild-type, ndhN, ndhO, ndhH, and ndhJ deletion mutants. Each lane was loaded with thylakoid membrane proteins corresponding to 3 μg chlorophyll a.