Research ArticleCELLULAR AND MOLECULAR
Influence of a Lysine 331 Counterion on the pK
a of Aspartic Acid 125: Evidence for a Salt-Bridge Interaction and Role in α1b-Adrenergic Receptor Activation
James E. Porter and Dianne M. Perez
Journal of Pharmacology and Experimental Therapeutics January 2000, 292 (1) 440-448;