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dc.contributor.authorGandía Herrero, Fernando-
dc.contributor.authorEscribano, Josefa-
dc.contributor.authorGarcía Carmona, Francisco-
dc.date.accessioned2025-07-17T08:23:41Z-
dc.date.available2025-07-17T08:23:41Z-
dc.date.issued2012-05-29-
dc.identifier.citationJournal of Natural Products 2012, 75, 1030−1036es
dc.identifier.issnPrint: 0163-3864-
dc.identifier.issnElectronic: 1520-6025-
dc.identifier.urihttp://hdl.handle.net/10201/157500-
dc.description© 2012, American Chemical Society and American Society of Pharmacognosy. This document is the Published version of a Published Work that appeared in final form in Journal of Natural Products. To access the final edited and published work see https://doi.org/10.1021/np200950nes
dc.description.abstractBetalamic acid [4-(2-oxoethylidene)-1,2,3,4-tetrahydropyridine2,6-dicarboxylic acid] is a naturally occurring compound that is normally found condensed with amino acids, amines, cyclo-DOPA, and cyclo-DOPA derivatives to form the betalains. Betalains are the pigments responsible for the yellow to violet color of the fruits and flowers of plants belonging to the order Caryophyllales. Betalamic acid is the structural feature common to all of these pigments and contains the electron resonance system responsible for the spectroscopic properties. Betalamic acid was purified by chromatography and identified by UV−vis spectrophotometry and ESI mass spectrometry. The antioxidant and free radical scavenging capacities of betalamic acid were assessed using the FRAP and ABTS·+ radical assays. A pKa of 6.8 was found for the deprotonation equilibrium involved in the nucleophilic activity of betalamic acid; this pKa explains the observed pH effect on the free radical scavenging capacity of these pigmentses
dc.formatapplication/pdfes
dc.format.extent7es
dc.languageenges
dc.publisherAmerican Chemical Society-
dc.relationThis work was supported by the Ministerio de Ciencia e Innovación (MICINN, FEDER, Spain) (Projects AGL2010-17938 and AGL2011-25023) and by the Programa de Ayudas a Grupos de Excelencia de la Región de Murcia, de la Fundación Séneca, Agencia de Ciencia y Tecnología de la Región de Murcia (Plan Regional de Ciencia y Tecnología 2007/2010). F.G.-H. has a contract with the “Programa Ramón y Cajal” (MICINN, FEDER, Spain).es
dc.rightsinfo:eu-repo/semantics/embargoedAccesses
dc.subject.otherCDU::5 - Ciencias puras y naturales::57 - Biología::577 - Bioquímica. Biología molecular. Biofísicaes
dc.titlePurification and antiradical properties of the structural unit of betalainses
dc.typeinfo:eu-repo/semantics/articlees
dc.relation.publisherversionhttps://pubs.acs.org/doi/10.1021/np200950n-
dc.embargo.termsSi-
dc.identifier.doihttps://doi.org/10.1021/np200950n-
dc.contributor.departmentDepartamento de Bioquímica y Biología Molecular "A"es
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