Excision of P{EP}Fmr1EP3517 and deletion of distal flanking DNA including the entire Fmr1 ORF.
At day 5 post-eclosion, Fmr12 mutant brains retain midline PDF tritocerebral (PDF-TRI) neurons that are not present in age-matched wild-type.
The number of mature type 1b boutons is significantly increased in the Fmr1Δ50M null synapse and the number of immature satellite boutons is similarly elevated. The increase in number of mature boutons and the accumulation of satellite neurons are both rescued when the larvae are fed >20uM minocycline.
Flies show no visible phenotypic abnormalities.