Genomic structure, locations of common SNPs and possible binding sites in the H2AFX gene. Numbering is based on cDNA sequence (GenBank DQ015918). The nucleotide 5′ of the ATG-translation initiation codon is −1, +1 corresponds to the A of the ATG translation initiation codon in the reference sequence. The −676T > G locus was in complete LD with −1187T > C, thus, four SNPs (−1654A > G, −1420G > A, −1187T > C, and 1057C > T) were selected as the tagging SNPs. Bioinformatics analysis for the promoter SNPs: −1654G but not −1654A is the binding site for oncogene c-Jun; −1420G but not −1420A is a binging site fro insulin activator factor; −1187T but not −1187C has a binding site for progesterone receptor; and −676T (which completely linked with −1187T) but not −676G has a binding site for transcription factor PU.1