A bunch of pigments that are either red or yellow in color.

Eg: Lycopene is the carotenoid that gives tomatos their red color.

One of a group of red, orange, purple or yellow pigments typically found as accessory pigments in plants and some fungi. They are fat-soluble and are called lipochromes when they are found concentrated in animal fat. Carotenoids are widely used as food colorings, and one pigment, beta carotene, is used as a source of Vitamin A. Compare anthocyanin.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

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