RORα is a novel member of the steroid/thyroid/retinoid receptor superfamily with unique DNA-binding properties. We have mapped the RORA gene by fluorescence in situ hybridization to human chromosome 15q21-q22. To map the mouse Rora gene, a partial mouse cDNA clone was isolated from brain. Using interspecific backcross analysis, we have mapped the Rora gene to mouse chromosome 9. This places the human RORA gene in the proximity of the PML gene, which is involved in a reciprocal chromosomal translocation t(15:17) with the RARA gene in patients with acute promyelocytic leukemia.
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