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This equation is used when X values are concentrations or doses. Use a related equation when X values are logarithms of concentrations or doses.

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The best-fit curve will be identical, but the parameter values will differ. The best fit value of the "EC50" will be very different.

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Neubig, personal communication). This term is not very standard, and is a bit misleading as there is nothing absolute about an "absolute EC50". The concept (but ...

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EC50 values are blank. This problem can occur when: you create (or save) a file in Prism 5.01 and open the file using Prism 4. It only happens when you fit ...

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EC50 is the concentration of agonist that gives a response half way between ... Depending on which units Y is expressed in, and the values of Bottom and Top, the ...

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The pEC50 is defined as the negative logarithm of the EC50. If the EC50 equals 1 micromolar (10 -6 molar), the log(EC50) is -6 and the pEC50 is 6.

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Many log(dose) response curves follow the familiar symmetrical sigmoidal shape. The usual goal is to determine the EC50 of the agonist - the concentration that ...

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The graph below shows two dose-response curves. The goal of the experiment is to determine the two EC50 values. The EC50 is the concentration (dose) that ...

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It fits four parameters: the bottom and top plateaus of the curve, the EC50 (or IC50), and the slope factor (Hill slope). This curve is symmetrical around ...

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The EC50 (or IC50) refer to a concentration of agonist (or antagonist) required to increase (or reduce) the measured response to half - or 50% - of its maximal ...

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