Intergenic conserved region (IGCR) within the FGF6-FGF23 gene cluster was identified based on the evolutionary conservation.     ///    This is the first report on comparative genomics analyses on human FGF6-FGF23 gene cluster and rodents Fgf6-Fgf23 gene cluster..     ///    Comparative genomics on mammalian Fgf6-Fgf23 locus..     ///    Human FGF6-FGF23 IGCR (nucleotide position 111648-112242 of AC008012.8 genome sequence) and rat Fgf6-Fgf23 IGCR (nucleotide position 156318-156894 of AC103292.6 genome sequence) showed 77.6% total nucleotide identity. 