Biomaterial Database

[Identification of beta, beta-caroten-2-ol and beta, beta-carotene-2,2'-diol in the stick insect, Carausius morosus Br.; a reinvestigation study]. 1976

H Kayser

Two major carotenoids of the stick insect were reinvestigated and shown to be beta,beta-caroten-2-ol and beta,beta-carotene-2,2'-diol and not isocryptoxanthin (beta,beta-carotin-4-ol) and isozeaxaanthin (beta,beta-carotene-4,4'-diol). Both pigments are esterified with fatty acids. The identification is based on cochromatography with authentic 2-, 3- and 4-isomers of the mono- and dihydroxy pigment, mass spectra, and chemical behaviour. In acid solution beta-beta-carotene-2,2'-diol is specifically dehydrogenated and rearranged to ketones with retro structures in analogy to the reactionof beta,beta-caroten-2-ol as recently reported. The final product of the diol is 4,5-dihydro-4,5'-retro-beta,beta-carotene-2,2'-dione. This is the first demonstration of beta,beta-carotene-2,2'-diol in an animal.

UI	MeSH Term	Description	Entries
D009987	Orthoptera	An order of insects comprising two suborders: Caelifera and Ensifera. They consist of GRASSHOPPERS, locusts, and crickets (GRYLLIDAE).	Caelifera,Ensifera,Caeliferas,Ensiferas,Orthopteras
D002338	Carotenoids	The general name for a group of fat-soluble pigments found in green, yellow, and leafy vegetables, and yellow fruits. They are aliphatic hydrocarbons containing 4 terpene subunits.	Carotenes,Carotenoid,Tetraterpene Derivatives,Tetraterpenes,Carotene,Derivatives, Tetraterpene
D002855	Chromatography, Thin Layer	Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Chromatography, Thin-Layer,Thin Layer Chromatography,Chromatographies, Thin Layer,Chromatographies, Thin-Layer,Thin Layer Chromatographies,Thin-Layer Chromatographies,Thin-Layer Chromatography
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013053	Spectrophotometry	The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum.
D013058	Mass Spectrometry	An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.	Mass Spectroscopy,Spectrometry, Mass,Spectroscopy, Mass,Spectrum Analysis, Mass,Analysis, Mass Spectrum,Mass Spectrum Analysis,Analyses, Mass Spectrum,Mass Spectrum Analyses,Spectrum Analyses, Mass