A CTG to CAG nucleotide substitution has been introduced at the alternative start codon and the normal start codon has been mutated from ATG to TTG. Only the long isoform is produced by this construct, at a higher level than is normally seen in wild-type flies.
Fmr1WTRLN-ATG partially rescues Fmr13
The increased number of boutons at the neuromuscular junction that is seen in Fmr13 larvae is rescued by Fmr1WTRLN-ATG. The high frequency of β-lobe crossover seen in the mushroom bodies of Fmr13 pharate adult brains is partially suppressed by Fmr1WTRLN-ATG.