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Fig. 2 | BMC Genomics

Fig. 2

From: Histone modifications facilitate the coexpression of bidirectional promoters in rice

Fig. 2

Coexpression analysis of bidirectional gene pairs. a. Comparison of expression correlation between gene pairs from type I, II and III BDPs, and randomly selected unidirectional genes. The Pearson correlation coefficients were calculated from all gene pairs using the absolute expression values. A statistical analysis was performed using a two-sample K-S test, where ** p < 0.001. b. Comparison of coexpression correlation between coexpressed gene pairs and randomly selected unidirectional genes. The expression mode of each gene pair was classified into two categories, coexpression or anti-expression, based on the Pearson correlation coefficients. A positive Pearson correlation coefficient indicated coexpression (Fig. 2b ), and a negative Pearson correlation coefficient indicated anti-expression (Fig. 2c ). All gene pairs with positive Pearson correlation coefficients were selected for analysis. Significant difference were determined using a two-sample K-S test, where ** p < 0.001. c. Comparisons of the expression correlations between anti-expressed gene pairs and randomly selected unidirectional genes. All gene pairs with negative Pearson correlation coefficients were selected for analysis. A statistical analysis was performed using a two-sample K-S test, where ** p < 0.001

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