Biological Pigments
- Heme/porphyrin-based: chlorophyll, bilirubin, hemocyanin, hemoglobin, myoglobin
- Light-emitting: luciferin
- Carotenoids:
- Hematochromes (algal pigments, mixes of carotenoids and their derivates)
- Carotenes: alpha and beta carotene, lycopene, rhodopsin
- Xanthophylls: canthaxanthin, zeaxanthin, lutein
- Proteinaceous: phytochrome, phycobiliproteins
- Polyene enolates: a class of red pigments unique to parrots
- Other: melanin, urochrome, flavonoids
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Famous quotes containing the word biological:
“When human beings have been fascinated by the contemplation of their own hearts, the more intricate biological pattern of the female has become a model for the artist, the mystic, and the saint. When mankind turns instead to what can be done, altered, built, invented, in the outer world, all natural properties of men, animals, or metals become handicaps to be altered rather than clues to be followed.”
—Margaret Mead (1901–1978)