Carotenoid
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High Quality Content by WIKIPEDIA articles! Carotenoids are organic pigments that are naturally occurring in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms like algae, some types of fungus and some bacteria. There are over 600 known carotenoids; they are split into two classes, xanthophylls which contain oxygen and carotenes which are purely hydrocarbons, and contain no oxygen. Carotenoids in general absorb blue light. They serve two key roles in plants and algae: they absorb light energy for use in photosynthesis, and they protect chlorophyll from…mehr

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High Quality Content by WIKIPEDIA articles! Carotenoids are organic pigments that are naturally occurring in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms like algae, some types of fungus and some bacteria. There are over 600 known carotenoids; they are split into two classes, xanthophylls which contain oxygen and carotenes which are purely hydrocarbons, and contain no oxygen. Carotenoids in general absorb blue light. They serve two key roles in plants and algae: they absorb light energy for use in photosynthesis, and they protect chlorophyll from photodamage. In humans, four carotenoids beta-carotene, alpha-carotene, gamma-carotene, and beta-cryptoxanthin have vitamin A activity meaning they can be converted to retinal, and these and other carotenoids can also act as antioxidants.