FIG. 2.

Representative HPLC chromatograms for VUG-A42aa (A) and VUG-A141a (B). Carotenoids were detected using the HPLC PDA detector at 470 nm and numbered in accordance with Tables 1 and 2. Carotenoids 1 and 2 were present at concentrations below the detection level in this sample and are therefore not labeled. Brackets indicate stereoisomer groups as determined by the presence of cis peaks in their UV absorption spectra. An abbreviated timescale showing only minutes 4 to 12 is shown as no carotenoids were detected outside this range. Panel C shows the proposed structure of the trans isomer of carotenoid 5, 2′-hydroxyflexixanthin.