Fig. 3

OsRR22 binding sites in differentially expressed genes in rice roots and shoots. a Position weight matrix representations of the top-scoring DNA-binding motifs for OsRR22 as determined by the protein binding microarray. b-c Percentage of cytokinin-regulated genes in roots that contained one or more of the top 25 8-mer sequences that showed significant binding for OsRR22 (see methods). Percentages indicated with vertical dashed lines were (b) 27.8% of up-regulated genes, (c) 23.7% of down-regulated genes. Histograms show the distribution of percentages obtained from 1,000 random samples of equivalent size