Table 2

Filtering of variants identified by whole exome sequencing

ProbandFatherMother
Total variants19 94019 88819 747
 Known variants (dbSNP132)19 37119 31119 220
 Transitions to Transversion ratio (dbSNP132)3.23.23.3
 Amino acid changing variants992610 0199889
 Amino acid changing variants with Minor allele frequency<1%600627617
 High quality de novo variants3