Distribution of Tetrapyrroles in Nature
Phytochrome (orange-red-far-red) Phycocyanin (blue) Phycoerythrin (yellow-orange)
Chlorophyll a (blue-green) and chlorophyll b (green) Bilirubin (orange) Heme (red)
Wide distribution in green plants Blue green algae Red algae
Higher plants, ferns, mosses, green algae Vertebrates
Ubiquitous in live organisms
Sources: Adapted from Hendry (1996)1 and Delgado-Vargas et al. (2000).2
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