mNG insertion in the sdn-1 locus has no effect on NMJ organization. (A) Confocal detection and quantification of the number of cholinergic presynaptic active zones, using the CLA-1-BFP marker under the control of Punc-17 promoter, in control and mNG-sdn-1 knock-in animals. (B) Confocal detection and quantification of L-AChRs (UNC-29-RFP) in control and mNG-sdn-1 animals. (C) Confocal detection and quantification of the number of GABAergic active zones, using the CLA-1-BFP marker under Punc-47 promoter, in control and mNG-sdn-1 animals. (D) Confocal detection and quantification of GABA_ARs (UNC-49-RFP) in control and mNG-sdn-1 animals. Scale bars, 10 µm.