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Sequence analysis of RHO in family RP21. A: Sequence trace of part of exon 2 of an affected individual (RP21-IV-1) showing the homozygous mutant sequence c.448G>A. B: Sequencing results of RP21-IV-7 showing the heterozygous c.448G>A sequence. C: Sequence trace of an unaffected individual with the homozygous wild-type c.448G. d
