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. Author manuscript; available in PMC: 2012 Aug 26.
Published in final edited form as: J Biol Chem. 1995 Jun 9;270(23):13987–13997. doi: 10.1074/jbc.270.23.13987

Fig. 2. Displacement of binding of the antagonist radioligand [3H]XAC from Tag3-A2a wild type (●) and S277A (○) mutant receptors expressed in COS-7 cells.

Fig. 2

Competitors used were CGS 21680 (A), 2-chloroadenosine (B), and N6-phenylisopropyladenosine (C). Competition binding studies were carried out using membrane homogenates prepared from transfected COS-7 cells, as described under “Experimental Procedures.” Data are presented as means ± S.E. of two or three independent experiments, each performed in duplicate.