heme and chlorophyll, similarities in their chemical structureheme and chlorophyll similarities in chemical structure

heme chlorophyll haem red blood plant green pigment iron magnesium protoheme porphyrin photosynthesis oxygen transport chlorophyll atom nitrogen heme haem protoheme ix chemical formula structure chemical precursor hemoglobin absorption light energy sunlight oxygen myoglobin plane ring complex organic compound skeletal molecule substance molecular composition science research biology biochemistry isolated vector