I restriction enzyme map of the promoter region of different
alleles. Start codon and the 1st exon are indicated by the right-angled arrow flanking the grey rectangle. The positions of specific primers are shown at the top of the diagram. Dashes with black circles indicate Msp I restriction sites. Lengths of restriction fragments longer than 100 bp are indicated. Micro-deletions and insertions are shown by the empty and filled triangles, respectively, with sizes indicated. Positions of the CArG box and nucleotide G → C substitution are shown.