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:
“Much of the ill-tempered railing against women that has characterized the popular writing of the last two years is a half-hearted attempt to find a way back to a more balanced relationship between our biological selves and the world we have built. So women are scolded both for being mothers and for not being mothers, for wanting to eat their cake and have it too, and for not wanting to eat their cake and have it too.”
—Margaret Mead (1901–1978)