Figure 2. ATP- and αβ-me-ATP-elicited multiple responses.
A, the incidence of four kinds of ATP-elicited responses including only presynaptic action (a), presynaptic and postsynaptic actions (b), only postsynaptic action (c) and no action (d) in P28–30 neurones. B, the incidence of four kinds of αβ-me-ATP-elicited responses including only presynaptic action (a), presynaptic and postsynaptic actions (b), only postsynaptic action (c) and no action (d). Note that αβ-me-ATP-elicited postsynaptic currents were more quickly desensitized than ATP-elicited postsynaptic currents.