Relationships between NAT pairs from different datasets. (a) Overlap between cDNA-NAT pairs and genomic-NAT pairs. Among the 332 cDNA-NAT pairs, 145 pairs have corresponding annotated genes for both transcripts. For the other 187 cDNA-NAT pairs, at least one transcript has no counterpart in the current Arabidopsis genome annotation. (b) Overlap between cDNA-, genomic- and genomic-cDNA-NAT pairs. All cDNA-NAT pairs are included in genome-cDNA-NAT pairs. Blue circle, cDNA-NATs; red circle, genomic-NATs; green circle, genomic-cDNA-NATs.