The Determination of Protonation States in Proteins.
Ahmed, H.U., Blakeley, M.P., Cianci, M., Cruickshank, D.W.J., Hubbard, J.A., Helliwell, J.R.(2007) Acta Crystallogr.,Sect.D 63: 906
- PubMed: 17642517 
- DOI: 10.1107/S0907444907029976
- Primary Citation of Related Structures:  
- PubMed Abstract: 
The protonation states of aspartic acids and glutamic acids as well as histidine are investigated in four X-ray cases: Ni,Ca concanavalin A at 0.94 A, a thrombin-hirugen binary complex at 1.26 A resolution and two thrombin-hirugen-inhibitor ternary c ...