Fig. 4 in P450 variations bifurcate the early terpene indole alkaloid pathway in Catharanthus roseus and Camptotheca acuminata

Fig. 4. LC-MS analyses of in vitro assays with purified His6-tagged CYP72A proteins reconstituted with His6-tagged CPR proteins. Reactions containing purified His6- tagged CYP72A protein, full-length His6-tagged Caa CPR1 protein (A, B) or full-length His6-tagged Caa CPR2 protein (C, D), and 250 μM loganic acid (A,C) or loganin (B,D), were incubated at 30◦ C and analyzed by LC-MS as described in experimental procedures. Extracted ion chromatograms for loganic acid (m/z 375.1297), secologanic acid (m/z 373.1140), secoxyloganic acid (m/z 389.1089); loganin sodium salt (m/z +413.1418), secologanin sodium salt (m/z +411.1262), secoxyloganin (m/z 403.1246) are given with stacked chromatograms as marked.