Components of protocyanin, a blue pigment from the blue flowers of Centaurea cyanus
2005; Elsevier BV; Volume: 66; Issue: 13 Linguagem: Inglês
10.1016/j.phytochem.2005.04.002
ISSN1873-3700
AutoresKŏsaku Takeda, Akiko Osakabe, Shinomi Saito, Daisuke Furuyama, Atsuko Tomita, Yumi Kojima, Mayumi Yamadera, Masaaki Sakuta,
Tópico(s)Free Radicals and Antioxidants
ResumoThe components involved in the formation of protocyanin, a stable blue complex pigment from the blue cornflower, Centaurea cyanus, were investigated. Reconstruction experiments using highly purified anthocyanin [centaurocyanin, cyanidin 3-O-(6-O-succinylglucoside)-5-O-glucoside], flavone glycoside [apigenin 7-O-glucuronide-4'-O-(6-O-malonylglucoside)] and metals, Fe and Mg, showed the presence of another factor essential for the formation of protocyanin. The unknown factor was revealed to be Ca. Reconstructed protocyanin using anthocyanin, flavone, Fe, Mg, and Ca was identical with protocyanin from nature in UV-Vis and CD spectra, and was isolated as crystals for the first time. In addition, substitution of the metal components in protocyanin with other metals was also examined.
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