Carotene

β-Carotene representit bi a 3-dimensional stick diagram

The term carotene (an aa carotin, frae the Laitin carota, "carrot") is uised for mony relatit unsaturatit hydrocaurbon substances haein the formula C₄₀H_x, which are seenthesized bi plants but in general canna be made bi ainimals (wi the sole kent exception o some aphids an spider mites which acquired the seenthetic genes frae fungi).