Abstract
We isolated the human glutamate receptor δ2 (GRID2) gene, which has 97.0% identity in amino acid sequence to the mouse glutamate receptor δ2 (Grid2) gene. We subsequently mapped this gene to human chromosome 4q22 by radiation hybrid mapping and by hybridization to two overlapping human yeast artificial chromosomes that are located in 4q22. TheGrid2gene, which is mutated in lurcher (Lc) mice, maps to mouse chromosome 6. Thus, the mapping of theGRID2gene to human chromosome 4q22 confirms and refines a region of synteny between mouse and human genomes.