Figure 1. Oxotremorine M-induced concentration-dependent stimulation of intracellular calcium mobilization in CHO-K1/M4/Gα15 cells. The cells were loaded with Calcium-4 prior to be stimulated with an M4 receptor agonist, oxotremorine M. The intracellular calcium change was measured by FLIPRTETRA. The relative fluorescent units (RFU) were plotted against the log of the cumulative doses (5-fold dilution) of oxotremorine (Mean ± SD, n = 2). The EC50 of oxotremorine M on this cell was 88.7 nM.
Notes:
1. EC50 value is calculated with four parameter logistic equation:
Y=Bottom + (Top-Bottom)/(1+10^((LogEC50-X)*HillSlope))
X is the logarithm of concentration. Y is the response
Y is RFU and starts at Bottom and goes to Top with a sigmoid shape.
2. Signal to background Ratio (S/B) = Top/Bottom
CHO-K1/M4/Gα15 Stable Cell Line
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