Figure 2. Patterns of conserved synteny in the chromosomal regions that harbor the DRD₁ class of dopamine receptors.

(A) Chromosomal region that harbors the DRD₁ gene; (B) Chromosomal region that harbors the DRD_1C gene; (C) Chromosomal region that harbors the DRD_1E gene; (D) Chromosomal region that harbors the DRD₅ gene. Asterisks denote that the orientation of the genomic piece is from 3′ to 5′, gray lines represent intervening genes that do not contribute to conserved synteny whereas dashed lines represent genes that are not present.