Towards structural and functional characterization of photosynthetic and mitochondrial supercomplexes.

•Choice of detergent and separation methods are crucial for obtaining supercomplexes.•OXPHOS complexes of protists differ from those of bacteria and mammals.•Supercomplexes of photosystem II should be studied in a wider range of species.•The supercomplex of photosystem I and cytochrome b6f is hard to characterize.•The existence of the synthasome is an open question.