However , this study showed that the retinal dystrophy associated with this mutation was characteristically mild in presentation and course .
In 2000 , a rare mutation in codon 23 was reported causing autosomal dominant retinitis pigmentosa , in which proline changed to alanine .
This study showed that the retinal dystrophy associated with this mutation was characteristically mild in presentation and course .
In 2000 , a rare mutation in codon 23 was reported causing autosomal dominant retinitis pigmentosa , in which proline changed to alanine .