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379 bytes added ,  10:48, 21 October 2008
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Therefore a drug that has a higher affinity to a receptor has a lower '''K<sub>A</sub>''' value.
 
Therefore a drug that has a higher affinity to a receptor has a lower '''K<sub>A</sub>''' value.
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* The biological response of resulting from an agonist is proportional to the number of receptors occupied. The size of a response can be measured  and plotted against the dose/concentration of the agonist. As the size of a response normally increasee in a non-linear manner (until the maximum is reached) the response is normally plotted against the log of the concentration.
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