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Published in final edited form as: FEBS Lett. 1986 Apr 21;199(2):269–274. doi: 10.1016/0014-5793(86)80493-8

Fig. 1 — Stimulation of adenylate cyclase activity of human platelet membranes by NECA in the absence ( ) and presence of XAC (2 nM, ; 20 nM, ; 200 nM, ). Adenylate cyclase activity was determined at 37°C for 90 min. Right: Schild plot of the same data with the concentration ratio (CR) of the EC₅₀ values for NECA in the presence and absence of XAC vs the XAC concentration (slope, 1.05; r = 0.9993). EC₅₀ values for NECA: 0.255 μM in the absence and 0.27, 0.46 and 2.29 μM in the presence of 2, 20 and 200 nM XAC, respectively. Values are means of a typical experiment done in triplicate.

Inline graphic — Stimulation of adenylate cyclase activity of human platelet membranes by NECA in the absence ( ) and presence of XAC (2 nM, ; 20 nM, ; 200 nM, ). Adenylate cyclase activity was determined at 37°C for 90 min. Right: Schild plot of the same data with the concentration ratio (CR) of the EC₅₀ values for NECA in the presence and absence of XAC vs the XAC concentration (slope, 1.05; r = 0.9993). EC₅₀ values for NECA: 0.255 μM in the absence and 0.27, 0.46 and 2.29 μM in the presence of 2, 20 and 200 nM XAC, respectively. Values are means of a typical experiment done in triplicate.