Table 1

Summary of agonist properties

ATP0.7  ±
2meSATP1.3  ±
ATPγS2.0  ±
α,β-meATP3.1  ±
ADP13  ±
CTP18.6  ±

EC50 was determined from a three-parameter (EC50,Imax, nH) curve fit to pooled data as described in Materials and Methods; estimates are expressed as mean ± S.D. EPMR, equipotent molar ratio and equals (EC50, test agonist)/(EC50, ATP). N, number of cells contributing to the pooled data for each agonist.