For 10 points, name this substance that absorbs light in photosynthesis, a green pigment found in plants.
FMO protein and an analogue of this substance are uncharacteristically synthesized by Cab. thermophilum under oxic conditions. Aerobic oxidative cyclase is critical in the formation of this substance as is either LPOR (ell-"poor") or DPOR (dee-"poor"). The genes psbA and psbD encode two proteins that bind it, D1 and D2. This (*) porphyrin chelates a magnesium ion, and its a and b types differ in their absorption spectra and are found in "special pairs" called P680 and P700. Pheophytin is provided with high-energy electrons by this substance, which is embedded in the thylakoid membrane. For 10 points, name this substance that absorbs light in photosynthesis, a green pigment found in plants.
FMO protein and an analogue of this substance are uncharacteristically synthesized by Cab.
{chlorophyll}