Figure 2

Comparison with previous studies. (a) Venn diagram comparing the genes induced during sporulation in our experiment and in two previous experiments [7,8]. A gene was defined as 'induced' at a particular time point, if its expression level at that time point was at least twofold higher than that of the pre-sporulation reference. All genes that were induced in at least one of the sporulation time points were considered (the area in the Venn diagram is proportional to the number of genes [63]). The average correlations between pairs of experiments are indicated (see Materials and methods for how correlations were calculated). (b) Examples of expression profiles for specific genes obtained in the current study (blue) and in the previous studies (red [7] and black [8]).