Pharyngeal recordings from wild-type and unc-64 mutant animals. Shown are characteristic electrophysiological recordings from the wild-type strain N2 (A), unc-64(e246) (B), unc-64(js21) (C), unc-64(md130) (D), aex-3(y255) (E), snb-1(js17) (F), and unc-64(js21); snb-1(js17) (G). Arrows indicate MC-induced transients, and filled circles indicate M3-induced transients. All traces are millivolts versus time.