Fig. 1: Identification of compound heterozygous mutations in the NBAS gene in the patient and her family.

a, b Family pedigree. The patient’s mother carried the c.1342 T > C (p.Cys448Arg) missense mutation in one NBAS allele, whereas the patient’s father carried the c.938_939delGC frameshift mutation. c Sanger sequence analysis confirmed the segregation of two NBAS mutations: NBAS c.938_939delGC and c.1342 T > C (p.Cys448Arg) in this family. d The c.1342 T > C (p.Cys448Arg) mutation affects evolutionarily conserved amino acid residues in multiple species.