A 351-bp genomic deletion removing parts of exon 8, most of exon 9, and the entire intron 9, which corresponds to a 286-bp deletion in the norpA
cDNA. The resulting protein is predicted to encode 436 N-terminal amino acids identical to the wild type protein, followed by a frame-shift, resulting in the substitution of 120 amino acids and a premature stop codon. The mutant protein would interrupt the catalytic domain and lack the C-terminal tail required for Gαq
interaction and rhabdomere localization.