This mutation was identified in an ENU mutagenesis screen focused on the Del(13)36H deletion interval, which encompasses 12.66 Mb, or approximately 20%, of mouse Chromosome (Chr) 13 including bands A3.1 through A4. The deleted segment shares synteny with regions of human 6p25 and 6p22 associated with 6p deletion syndromes and 6p associated disorders. (J:101156)