Comparative analysis of RDR1/2/6-dependent antisense RNA loci and RDR1/2/6-dependent small RNA loci. A, Venn diagram comparing 1,136 RDR1/2/6-dependent antisense RNA loci within 7,138 sense-antisense transcripts (SATs) loci with custom array probes and 2,325 RDR1/2/6-dependent small RNA loci. B, Classification of five groups based on functional categories in the TAIR10 dataset.