- Generic term for a class of carotenes and their oxygenated derivatives (xanthophylls) consisting of 8 isoprenoid units (thus, tetraterpenes) joined so that the orientation of these units is reversed at the center, placing the two central methyl groups in a 1,6 relationship in contrast to the 1,5 of the others. All c. may be formally derived from the acyclic C40H56 structure known as lycopene, with its long central chain of conjugated double bonds by hydrogenation, dehydrogenation, oxidation, cyclization, or combinations of these. Included as c. are some compounds arising from certain rearrangements or degradations of the carbon skeleton, but not retinol and related C20 compounds. The nine-carbon end groups may be acyclic with 1,2 and 5,6 double bonds or cyclohexanes with a single double bond at 5,6 or 5,4 or cyclopentanes or aryl groups; these are now designated by Greek letter prefixes preceding “carotene” (α and δ, which are used in the trivial name s α-carotene and δ-carotene, are not used for that reason). Suffixes (-oic acid, -oate, -al, -one, -ol) indicate certain oxygen-containing groups (acid, ester, aldehyde, ketone, alcohol); all other substitutions appear as prefixes (alkoxy-, epoxy-, hydro-, etc.). The configuration about all double bonds is trans unless cis and locant numbers appear. The prefix retro- is used to indicate a shift of one position of all single and double bonds; apo- indicates shortening of the molecule. Many c. have anticancer activities.
Medical dictionary. 2011.
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carotenoids — carotenoids. См. каротеноиды. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
carotenoids — 1913, from Ger. carotinoïde (1911), from carotin (see CAROTENE (Cf. carotene)) + oid … Etymology dictionary
carotenoids — (kah rot e noids) Pigment molecules, usually yellowish in color, that are often used to aid chlorophyll in trapping light energy during photosynthesis … Dictionary of microbiology
carotenoids — Accessory lipophilic photosynthetic pigments in plants and bacteria, including carotenes and xanthophylls; red, orange or yellow, with broad absorption peaks at 450 480nm. Act as secondary pigments of the light harvesting system, passing energy… … Dictionary of molecular biology
carotenoids — n. any red or yellow pigment which is similar to carotene and found in plants and animals … English contemporary dictionary
provitamin A carotenoids — carotenoids, particularly the carotenes and cryptoxanthin, that can be converted to vitamin A in the body; they are a major source of vitamin A in a normal diet … Medical dictionary
Colorless carotenoids — The colorless carotenoids, phytoene and phytofluene, are natural carotenoids that lack visible color due to their lower number of conjugated double bonds on the C40 carbon backbone of the molecule. This structure allows them to absorb light in… … Wikipedia
Carotenoid — Carotenoids are organic pigments that are naturally occurring in 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… … Wikipedia
каротеноиды — carotenoids каротеноиды. Желтые, оранжевые или красные пигменты в основном растительного происхождения, являются полиненасыщенными углеводородами терпенового ряда; к К. относятся каротин, ксантофил и др. (Источник: «Англо русский толковый словарь … Молекулярная биология и генетика. Толковый словарь.
Carotenoderma — SignSymptom infobox Name = PAGENAME Caption = DiseasesDB = ICD10 = ICD10|L|81|9|l|80 ICD9 = ICD9|709.00 ICDO = OMIM = MedlinePlus = eMedicineSubj = derm eMedicineTopic = 789 MeshID = Carotenoderma (also carotenodermia) is the name given to the… … Wikipedia