Molecular Formula C55H74MgN4O6 Molecular Weight 911.5 g/mol Color Light green Table 1. Properties Structure The “head” portion (encircled in red) of the bacteriochlorophyll consists of a partially hydrogenated porphyrin ring known as chlorin. It contains a central magnesium atom. Meanwhile, the “tail” portion (encircled in blue) is a hydrocarbon chain, connecting to the head byContinue reading “Bacteriochlorophyll a”