
Differences in T-block occurrences between orthologous core promoters correlate with expression differences. (A) The nhr-127 gene has seven T-blocks in the strain CB4856, while its ortholog in the N2 strain has one less T-block. (B) The nhr-127 gene is more highly expressed in CB4856 than in N2. (C) Ratio of expression differences for three groups of genes: (1) Genes with more T-blocks in N2; (2) genes with more T-blocks in CB4856; and (3) genes with core promoter SNPs, yet the same number of T-blocks in both strains. More T-blocks correlate with higher expression. (D) Same format as C for A-blocks. A correlation with expression change was not detected.











