Delineation of Agonist Binding to the Human Histamine H4 Receptor Using Mutational Analysis, Homology Modeling, and ab Initio Calculations. - Aldo Jongejan; Herman D. Lim; Rogier A. Smits; Iwan J. P. de Esch; Eric E. J. Haaksma; Rob Leurs (J. Chem. Inf. Model., 2008)