The FlpStop cassette in the Mi{FlpStop}Nlg1MI02059-FlpStop.D has been inverted, resulting in the Mi{FlpStop.lock}Nlg1MI02059-FlpStop.NDlock insertion, in which the cassette is in the 'non-disrupting locked' (NDlock) orientation.
In pharate adults with sparse Nlg1MI02059-FlpStop.NDlock/Df(3R)BSC747 muscle clones in a Nlg1MI02059-FlpStop.D/Df(3R)BSC747 background (following Scer\FLP1-mediated inversion of Nlg1MI02059-FlpStop.ND), axonal branches of persistent motor neurons which innervate the abdominal lateral tergosternal muscles growing on clonal muscle fibres appear wild-type, while branches from the same neuron growing on non-clonal muscle display growth defects with reduced arbor coverage.