PS_1. 1AIJ - Brief introduction:

(PHOTOSYNTHETIC REACTION CENTER FROM  RHODOBACTER   SPHAEROIDES  IN THE CHARGE - NEUTRAL  $D{Q}_A{Q}_B$  STATE)

Classification: Photosynthetic Reaction Center;  
Deposited: 1997-04-18; Released: 1997-10-22
Deposited Author: Stowell, M.H.B.,  Mcphillips, T.M.,  Soltis, S.M.,  Rees, D.C.,  Abresch, E., Feher, G.
Experimental Data snapshot:
Method: X-Ray Diffraction
Resolution: $2.2 A^0$
1AIJ structural view - PyMOL
1AIJ is a 6 chain structure with sequence from Rhodobacter Sphaeroides [1]. These are represented by 3 sequence - unique entities [2].
(Rhodobacter Sphaeroides is a kind of purple bacteria; a group of bacteria that can obtain energy through photosynthesis). 
(Purple Bacteria are Proteobacteria that are Phototrophic: i.e capable of producing their own food via. Photosynthesis). 
1AIJ structural view - PyMOL
Molecule: Photosynthetic Reaction Center (L sub-unit); Chain: L, R 
Molecule: Photosynthetic Reaction Center (M sub-unit); Chain: M, S 
Molecule: Photosynthetic Reaction Center (H sub-unit); Chain: H, T