
Figure 1. UK14304-induced concentration-dependent stimulation of intracellular calcium mobilization in CHO-K1/ADRA2C/Gα15 cells. The cells were loaded with Calcium-4 prior to being stimulated with agonist UK14304 (Cat. No. U104-5MG; Sigma). The intracellular calcium change was measured by FLIPR. The relative fluorescent units (RFU) were plotted against the log of the cumulative doses of UK14304 (Mean ± SEM, n = 3). The EC50 of UK14304 on this cell was 3.25 nM.
Notes:
EC50 value is calculated with four parameter logistic equation:
Y=Bottom + (Top-Bottom) / (1+10^((LogEC50-X)*Hill Slope))
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.

Figure 2. Dose dependent stimulation of intracellular cAMP accumulation upon treatment with UK14304 in CHO-K1/ADRA2C/Gα15 cells. d2 acceptor fluorophore-labeled cAMP (Cat. No. 62AM4PEB; Revvity) and intracellular cAMP in CHO-K1/ADRA2C/Gα15 cells competitively bind with Europium Cryptate-labeled anti-cAMP antibody. The FRET signal decreases as the intracellular cAMP concentration rises and was measured by plate reader (Pherastar, BMG). The EC50 of UK14304 on CHO-K1/ADRA2C/Gα15 cells was 4.33 nM.
CHO-K1/ADRA2C/Gα15 Stable Cell Line
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