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|Section2= |Section3= }} Leucoanthocyanidin (flavan-3,4-diols) are colorless chemical compounds related to anthocyanidins and anthocyanins. Leucoanthocyanins can be found in ''Anadenanthera peregrina'' and in several species of ''Nepenthes'' including ''N. burbidgeae'', ''N. muluensis'', ''N. rajah'', ''N. tentaculata'', and ''N. × alisaputrana''.〔Adam, J. H., R. Omar & C. C. Wilcock 2002. Phytochemical screening of flavonoids in three hybrids of ''Nepenthes'' (Nepenthaceae) and their putative parental species from Sarawak and Sabah. ''OnLine Journal of Biological Sciences'' 2(9): 623–625. 〕 Such compounds include: * Leucocyanidin * Leucodelphinidin * Leucofisetinidin * Leucomalvidin * Leucopelargonidin * Leucopeonidin * leucorobinetinidin * Melacacidin * Teracacidin from ''Acacia obtusifolia'' and ''Acacia maidenii'' heartwoods〔Flavan derivatives. XIX. Teracacidin and isoteracacidin from Acacia obtusifolia and Acacia maidenii heartwoods; Phenolic hydroxylation patterns of heartwood flavonoids characteristic of sections and subsections of the genus Acacia. JW Clark-Lewis and I Dainis, Australian Journal of Chemistry, 20(10), pp. 2191-2198, 〕 Leucoanthocyanidins have been demonstrated to be intermediates in anthocyanidin biosynthesis in flowers of ''Matthiola incana''.〔(Leucoanthocyanidins as intermediates in anthocyanidin biosynthesis in flowers of Matthiola incana R. Br. Werner Heller, Lothar Britsch, Gert Forkmann and Hans Grisebach, 1984 )〕 Bate-smith recommended in 1954 the use of the Forestal solvent for the isolation of leuco-anthocyanins.〔Bate-Smith, E. C., Leuco-Anthocyanins, Biochem J. 1954 Sept; 58(1), pp. 122–125. (retrieved 27 sept 2010 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1269852/pdf/biochemj01081-0129.pdf )〕 ==Metabolism== Leucoanthocyanidin dioxygenase uses flavan-3,4-diols to produce 3-hydroxyanthocyanidins.〔(leucoanthocyanidin dioxygenase on mondofacto.com )〕 The gene encoding the enzyme (PpLDOX) has been identified in peach〔(Leucoanthocyanidin dioxygenase gene (PpLDOX): a potential functional marker for cold storage browning in peach, E. A. Ogundiwin, C. P. Peace, C. M. Nicolet, V. K. Rashbrook, T. M. Gradziel, F. A. Bliss, D. Parfitt and C. H. Crisosto, 2008 )〕 and expression has been studied in ''Vitis vinifera''.〔(Regulation of the leucoanthocyanidin dioxygenase gene expression in Vitis vinifera, Gollop R; Farhi S.; Perl A. 2001 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Leucoanthocyanidin」の詳細全文を読む スポンサード リンク
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