TY - JOUR AU - Ahmed,HU AU - Blakeley,MP AU - Cianci,M AU - Cruickshank,DWJ AU - Hubbard,JA AU - Helliwell,JR DO - 10.1107/S0907444907029976 EP - 922 PY - 2007/// SP - 906 TI - The determination of protonation states in proteins T2 - Acta Crystallographica Section D UR - http://dx.doi.org/10.1107/S0907444907029976 VL - 63 ER -