Figure 4

Correlation between microarray gene expression values and the number of small RNAs targeting to a gene. Genes are plotted using the number of mapped small RNAs (y-axis) and their normalized microarray expression levels (x-axis). The dashed line indicates the cutoff (0.2) for gene expression generally detectable by RT-PCR. (A) Plot for group I genes (each gene is represented by solid black triangle). (B) Plot for group II genes (each gene is represented by solid black triangle for antisense small RNA and open circle for sense small RNA). (C) Plot for group III genes (each gene is represented by an open circle for sense small RNA). (D) Box-and-whisker expression plots for genes in groups I, II, III as well as all genes represented on the microarray. The top and bottom ends of each box represent the 75th and 25th percentile, respectively; the middle line represents the median value.