HEADER PHOTOSYNTHESIS 31-DEC-69 7NHP COMPND MOL_ID: 4; COMPND 2 MOLECULE: Photosystem II D2 protein; COMPND 3 CHAIN: D; COMPND 4 EC: 1.10.3.9; COMPND 5 MOL_ID: 7; COMPND 6 Photosystem II reaction center protein H; COMPND 7 CHAIN: H; COMPND 8 MOL_ID: 13; COMPND 9 Photosystem II reaction center X protein; COMPND 10 CHAIN: X;