Fig. 1From: Histone modifications facilitate the coexpression of bidirectional promoters in riceComparison of GC contents between BDPs and randomly selected UDPs. Type I, II and III BDPs: bidirectional promoters with intergenic sizes ranging from 0 to 250Â bp; from 250 to 500Â bp and from 500 to 1000Â bp, respectively. R I, RII and RIII: randomly selected unidirectional promoters (UDPs) with sizes as 250Â bp, 500Â bp and 1000Â bp starting from upstream of TSS of the downstream genes, respectively, were used as controls for type I,II and III BDPs, respectively. Statistical analysis was conducted with a two-sample K-S testBack to article page