Figure 4.

DNase I sensitivity of duplicated genes. A, Correlation between DNase I sensitivity and expression level among duplicated genes. P1 represents genes with higher expression level of the pairs, and P2 represents genes with lower expression level of the pairs. B, An example of a duplicated gene pair. Gene GRMZM2G347056 is expressed in leaves and contains three DHSs and six CNSs located in its promoter region. GRMZM2G034278, a duplicated copy of GRMZM2G347056, is not expressed and does not contain DHS or CNS in its promoter region.