Figure 4.

Comparison of exon deletion (A) and duplication (B) among global populations. All these data showed that exons 45–55 are the most frequent deletion region of DMD gene. Deletion and duplication were not common in region of exons 56–79, although the data may derive from variant methodology (MLPA for Hong Kong, Taiwan, Denmark, Australia, and the current study; quantitative multiplex PCR for Canada; and multiplex PCR and Southern blotting for Japan and USA).