KRT5 (a heterozygous T>A transition at nucleotide 1730, changing phenylalanine (Phe) to tyrosine (Tyr) at position 577) KRT5 (two recurrent mutations c.1649delG (p.Gly550AlafsX77) and c.508G>(p.Glu170Lys in Chinese patients with mottled pigmentation EBS and localized EBS, respectively)