Figure 2. Sequence chromatograms of family RD004, RD021, and RD053 in which a novel homozygous pathogenic variant (i.e., c.800G>T, c.1153T>C, and c.1633A>T) was identified in the CNGA3, CNGB3, and CNGA1 gene, respectively. The wild-type/carrier sequence is shown on the left, and the mutated sequence is shown on the right.