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Forward sequence analysis of the normal and affected sequence of exon 6 of the CRYBB2 gene in this Chinese family. The sequence chromatogram indicates that there is a heterozygous mutation (c.465G>C) in exon 6 of CRYBB2 (black triangles), which leads to the replacement of Tryptophan with Cystine at the 151 amino acid position (p. Trp151Cys).
