Fig. 7.

Reduced success rate of EJPs at low bath [Ca²⁺] in para⁶³and Overine⁺. A,Representative traces of EJP recordings fromOverine⁺ larvae (a) and control larvae (b, c). The stimulus frequency for these traces was 10 Hz. Arrowheadshows failure of EJP response. Bath [Ca²⁺] was 0.15 mm. B, Quantitation of the success rate of EJPs for each genotype at the indicated [Ca²⁺]. Larval nerves were stimulated at a frequency of 1 Hz, and 25 responses were averaged per nerve. Nerves from seven larvae were tested for every data point (175 responses total per data point). Error bars represent SEMs.