AChR area, endplate area, and diameter distribution in mice electroporated. (A and B) AChR area, endplate area, and diameter distribution in mice electroporated with either mutants of HDAC6 (A) or mutants of tubulin (B). Graphical summary of NMJ AChR area, endplate area, and diameter (n = total number of NMJs counted on five mice for each condition). Graphs show means ± SEM. *, P < 0.05; **, P < 0.01; Mann-Whitney U test.