The formation of betalamic acid and muscaflavin by recombinant dopa-dioxygenase from Amanita
作者:Lukas A. Mueller、Ursula Hinz、Jean-Pierre Zryd
DOI:10.1016/s0031-9422(96)00625-5
日期:1997.2
anine (DOPA) to betalamicacid in the key reaction of betalain biosynthesis. In this work, we re-examined the reactivity of DOPA-dioxygenase using a cDNA clone encoding active DOPA-dioxygenase the kinetic parameters of which were comparable to those of the native enzyme. Using l -DOPA as a substrate, the enzyme catalysed the formation of two products. In addition to betalamicacid, the enzyme also
Intramolecular stabilization of acylated betacyanins
作者:Willibald Schliemann、Dieter Strack
DOI:10.1016/s0031-9422(98)00047-8
日期:1998.9
Racemization and stability of the betacyanins, betanin (betanidin 5-O-glucoside) and amaranthin (betanidin 5-O-glucuronosylglucoside), under acidic conditions were compared with those of the corresponding feruloyl derivatives, lampranthin II and celosianin II. Both acylbetacyanins showed a reduced racemization velocity and celosianin II in addition an enhanced stability, possibly caused by intramolecular association between the betanidin and the feruloyl moieties. (C) 1998 Elsevier Science Ltd. All rights reserved.
Barth, Hubert; Burger, Guenther; Doepp, Heinrike, Liebigs Annalen der Chemie, 1981, # 12, p. 2164 - 2179
作者:Barth, Hubert、Burger, Guenther、Doepp, Heinrike、Kobayashi, Makoto、Musso, Hans
DOI:——
日期:——
Changed betaxanthin pattern in violet flowers of Portulaca grandiflora after the feeding of DOPA