An EcoRI/BglII fragment has been removed from baboA.ΔI.UAS and replaced with an equivalent fragment from babo isoform B.
Expression of baboA.ΔI.Scer\UAS and baboB.ΔI.Scer\UAS together in motorneurons, driven by Scer\GAL4OK6, causes ISNb pathfinding defects and SNa branching defects. The more copies of baboA.ΔI.Scer\UAS that are expressed, the higher the penetrance of the phenotype. This phenotype also occurs when baboA.ΔI.Scer\UAS is expressed under the control of Scer\GAL4elav-C155.
Expression of baboA.ΔI.Scer\UAS and baboB.ΔI.Scer\UAS together in muscle, driven by Scer\GAL4Mef2.PR, results in a low penetrance of weak ISNb defects and no SNa defects.
When baboA.ΔI.Scer\UAS and baboB.ΔI.Scer\UAS are expressed together in glia, under the control of Scer\GAL4repo, only 4% of hemisegments show ISNb pathfinding defects and 2% show SNa branching defects.
Carried in plasmid "UAST-baboBΔI", and expressed in S2 cells.