Figure 1. Pedigrees of the two investigated families with retinitis pigmentosa. A: Family MA48. B: Family MA13. The arrow indicates the proband. Genotypes of the cases from whom DNA was available for analysis is indicated. M1=c.244–2A>C and M2=c.555G>A. M1/M1= homozygous mutant genotype; M1/+=heterozygous genotype.