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Binding displacement curves for Cl-IB-MECA (A) and MRS1898 (B) at human ARs expressed in CHO cells. A1 (n), A2A(s), and A3 (I). K1 values (Cl-IB-MECA; MRS 1989) at the following human ARs are (nM): A1 (1,240 ± 320; 136 ± 22), A2A(5,360 ± 2,470; 784 ± 97), and A3 (1.4 ± 0.3; 1.9 ± 0.4).
