Expression of NrgΔIg3-4 fails to rescue Nrgl4 mutant embryonic lethality. The axonal and NMJ defects seen in Nrgl4 mutant larval motorneuron clones are also not rescued and similar rates of innervation are seen for all four major classes of motorneurons (SNc/d, SNb, SNa and ISN) as controls.
Expression of NrgΔIg3-4 fails to rescue Nrgl7 mutant embryonic lethality.