Figure 1.

A comparison of the arrangements of overlapping gene pairs in Arabidopsis thaliana. A and A' label the start and end of the sense transcript, B' and B label the start and end of the antisense transcript. The total number of genes involved in group 1, 2 and 3 is 2,157, of which 2,147 are unique; the remaining 10 comprise four genes that are members of both group 1 and group 2 pairs, five genes that are members of both group 1 and group 3 pairs, and 1 gene that is a member of both a group 1 and group 3 pair.