Figure 5 of Winkler, Mol Vis 1999; 5:32.

Figure 5. Basic properties and structures of carotenoids

Basic properties of the macular carotenoids lutein and zeaxanthin; the structures of the macular carotenoids are shown with other carotenoids for comparison.

* Absorb blue light, protective against short wavelength visible light
* Quench singlet oxygen
* Quench triplet state of photosensitizers
* Inhibit autoxidation of lipids
* ß-carotene, an effective antioxidant at low P O2; assume same for macular carotenoids
* Undergo autoxidation
* Small amount of oxidation products detected in normal human and monkey retinas
(12 K)

Winkler, Mol Vis 1999; 5:32 <>
©1999 Molecular Vision <>
ISSN 1090-0535