... requires deter-mination of the EC50, the maximallypossible effect (Emax), and the slope at the point of inflection.54 Quantification of Drug ActionLüllmann, Color Atlas of Pharmacology © 2000 ... ligands, the kinetics of inter-action, and the characteristics of the binding site itself.In studying the affinity and number of such binding sites, use is made of membrane suspensions of different ... purifying and analyzing further the receptor protein.56 Quantification of Drug ActionLüllmann, Color Atlas of Pharmacology © 2000 ThiemeAll rights reserved. Usage subject to terms and conditions of...