Figure 2

Distribution of vectors corresponding to different light and dark periods for two distinct hydrogenase genes. The vectors represent the log₂ ratios of three time points for each corresponding 12 hour period. The vectors were plotted in a three-dimensional space, with axes corresponding to the 1^st, 2^nd, and the 3^rd time points within a 12 hour period. (a) The gene cce_2318 shows a cyclic expression profile under alternating light and dark conditions and does not reveal significant changes during the subjective dark period. (b) The expression of the gene cce_1063 alters considerably under subjective dark. Red colored vectors represent the different light periods, Blue colored vectors correspond to the dark periods, and Green vectors indicate subjective dark.