Fig. 3

The patient’s family pedigree. The c.575G > T mutation in PDH E1 β subunit was found in PDHB gene of this proband. The patient’s parents, each of whom carries a point mutation in the c.575G > T mutation in PDH E1 β subunit. The patient’s brothers are the same carrier. E1, physical examination; E2, whole-exome next-generation sequencing; P, proband