85-3724-37　Lutein Epoxide 1mg　281504

特徴

• The kinetics of response to strong light have been examined in deeply shaded leaves of the tropical tree legume (Inga sp.) which have extraordinarily high levels of the α-xanthophyll lutein-epoxide that are co-located in pigment–protein complexes of the photosynthetic apparatus with the β-xanthophyll violaxanthin. As in other species, rapidly reversible photoprotection (measured as non-photochemical chlorophyll fluorescence quenching) is initiated within the time frame of sun-flecks (minutes), before detectable conversion of violaxanthin to antheraxanthin or zeaxanthin. Photoprotection is stabilized within hours of exposure to strong light by simultaneously engaging the reversible violaxanthin cycle and a slowly reversible conversion of lutein-epoxide to lutein. It is proposed that this lutein ‘locks in’ a primary mechanism of photoprotection during photoacclimation in this species, converting efficient light-harvesting antennae of the shade plant into potential excitation dissipating centres. It is hypothesized that lutein occupies sites L2 and V1 in light-harvesting chlorophyll protein complexes of photosystem II, facilitating enhanced photoprotection through the superior singlet and/or triplet chlorophyll quenching capacity of lutein.
• Synonyms:all-trans-lutein epoxide; (3S,5R,6S,3'R,6'R)-lutein-5,6-epoxide; Lutein 5,6-epoxide;  all-E-lutein epoxide; β,-Carotene-3,3‘-diol, 5,6-epoxy-5,6-dihydro-,(3S,3‘R,5R,6S,6‘R)-; (1R,3S,6S)-6-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1R,4R)-4-hydroxy-2,6,6-trimethylcyclohex-2-en-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-1,5,5-trimethyl-7-oxabicyclo[4.1.0]heptan-3-ol
• Molecular Formula:C40H56O3
• Molecular Weight:584.87
• Purity:≥95%
• Appearance:Orange solid
• Storage and Stability:Store at 4ºC. Product is stable for 12 months after receipt.