Figure 1. Family structure of the eight Chinese families with Bietti crystalline corneoretinal dystrophy

Pedigrees of eight Chinese families with Bietti crystalline corneoretinal dystrophy associated with the mutations in CYP4V2. Males and females are represented by squares and circles, respectively. The symbols for affected family members are filled; the symbols for deceased family members have a slash. Where known, the symbol has been annotated to indicate whether alleles are mutant (M) or normal (N).