Photosynthetic reaction center cytochrome c subunit precursor; The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.

Light-harvesting protein B-880 alpha chain; Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers.

Light-harvesting protein B-870 beta chain; Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers.

Reaction center protein M chain; The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis.

Nitrogenase iron protein 1; Belongs to the NifH/BchL/ChlL family.

Light-independent protochlorophyllide reductase subunit B.

Magnesium-protoporphyrin O-methyltransferase.

Light-independent protochlorophyllide reductase iron-sulfur ATP-binding protein; Component of the dark-operative protochlorophyllide reductase (DPOR) that uses Mg-ATP and reduced ferredoxin to reduce ring D of protochlorophyllide (Pchlide) to form chlorophyllide a (Chlide). This reaction is light-independent. The L component serves as a unique electron donor to the NB-component of the complex, and binds Mg-ATP.