Figure 3From: SNPs and real-time quantitative PCR method for constitutional allelic copy number determination, the VPREB1 marker case Representation of Chromosome 22 with enlargement of the 22q11.2 region and qPCR markers locations. qPCR markers localization was shown with respect to the two most classical 3 Mb and 1.5 Mb microdeletions and two different examples of atypical deletions. PRODH, TUPLE1 and COMT markers recognized 3 Mb and 1,5 Mb microdeletions; D22S936 marker allowed to distinguish between 3 Mb or 1.5 Mb microdeletions; D22S181 and VPREB1, both localized outside the critical deletion region, allowed the detection of respectively proximal and distal atypical microalterations.Back to article page