Figure 1.—

DMY structure of the Hd-rR.Y^HNI congenic strain. Open boxes, shaded boxes, and the horizontal line indicate exons, the DM domain, and introns, respectively. Open arrowheads indicate the translation start site, ATG, and stop site, TGA. The numbers represent the nucleotide sequence lengths (bp). Solid arrows indicate the primer positions. Solid arrowheads indicate the positions of substitutions in the DMY of Y^wObu1. The region between the two dotted vertical lines was deleted in the DMY of Y^wObu2.