Calcium dependence of synaptic transmission, and postsynaptic cell properties, in Slob-null and WT flies. (A–C) Slob modulates various aspects of synaptic transmission: (A) EJC amplitude, (B) mEJC amplitude, and (C) mEJC frequency over a range of calcium concentrations. Input resistance (D) and cell capacitance (E) of the postsynaptic muscle cells are similar in WT^P41 (white bar) and mut^IP1 (black bar) lines.