Fig. 2

a Sequencing analysis revealed a heterozygous c.1385T > A transition in exon 7 of KRT6A in the proband’s genomic DNA from blood. b Sequencing analysis revealed a heterozygous c.1385T > A transition in exon 7 of KRT6A in his sister’s DNA from blood. c, d The sequence of DNA derived from the parents’ blood, e–f hair bulbs and g, h buccal smears was wild-type. i No mutation was identified in father’s sperm cells