Photosystem II 4 kDa reaction centre component
This family consists of various photosystem II 4 kDa reaction centre components (PsbK) from plant and Cyanobacteria. The photosystem II reaction centre is responsible for catalyzing the core photosynthesis reaction the light-induced splitting of water and the consequential release of dioxygen. In C. reinhardtii the psbK product is required for the stable assembly and/or stability of the photosystem II complex.