Properties of α,β-methylene-ATP concentration–effect curves with and without IVM on P2X_{4} receptors alone or when expressed in combination with P2X_{6} receptors

↵F1-a I_{max} is the largest current on the concentration–effect curve to α,β-methylene-ATP (100 or 300 μm).

↵F1-b The Hill slope was not possible to determine.

*Statistical difference (at p < 0.05) between these two EC_{50} values (p = 0.005; unpaired Student’s t test; also see Figure 4 for graphs).