2c2c is a 1 chain structure with sequence from Rhodospirillum rubrum. This structure supersedes the now removed PDB entry 1c2c. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
[CYC2_RHORU] Cytochrome c2 is found mainly in purple, non-sulfur, photosynthetic bacteria where it functions as the electron donor to the oxidized bacteriochlorophyll in the photophosphorylation pathway. However, it may also have a role in the respiratory chain and is found in some non-photosynthetic bacteria.