High resolution crystal structures of free thrombin in the presence of K(+) reveal the molecular basis of monovalent cation selectivity and an inactive slow form.
Carrell C.J., Bush L.A., Mathews F.S., & Di Cera, E. (2006). “High resolution crystal structures of free thrombin in the presence of K(+) reveal the molecular basis of monovalent cation selectivity and an inactive slow form.” Biophys Chem. 2006 Jun 1;121(3):177-84. Epub 2006 Feb 17. (Abstract)