D2 protein (PsbD) forms the reaction core of PSII (Photosystem II) as a heterodimer with the D1 protein (PsbA). PsbD is homologous to the D1 protein, with slightly higher molecular mass of about 39,5 kDa. Accumulation of D2 protein is an important step in the assemply of the PSII reaction centre complex.This product is a recombinant protein standard, source Synechocystis strain PCC 6803.
