Fig. 1

Frequency of each exon variants (deletion, duplication and minor variations) involved in DMD patients. The horizontal coordinate represents the exons 1–79, and the vertical coordinate shows the variant frequency of the exon in this study. Green represents the frequency of small variations (such as single nucleotide variation and < 50 bp fragment insertion/deletion), blue stands for the frequency of exon deletion, and red means the frequency of exon duplication. Exons 45–52 were the most frequently deleted for DMD patients