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Schematic representation of a 100-kb region of human chromosome 8p23.1 containing the DEFA1 and DEFA3 genes. Gene and SNP positions are based on May 2004 genome assembly (hg17), in which three copies of the DEFA1A3 are annotated. The non-homogeneous distribution of SNPs at the telomeric and centromeric regions of the DEFA1A3 cluster is clearly seen.
