Porphyrine
Porphin is the parent of the porphyrin compounds which include Haemin (haemaglobin) and chlorophyll.
Chlorophyll has different forms, it occurs as chlorophyll-a, b, c and d. It is the green pigment in plants, algae and cyanobacteria. Chlorophyll is responsible for photosynthesis which allows the water and carbon dioxide to be turned into sugars using light.
In its action one molecule of chlorophyll absorbs one photon and releases one electron.
Chlorophyll has the following forms:
These forms above are the main compounds in plants, chlorophyll-c and d occur mostly in algae and cyanobacteria.