Fig. 21
From: Ultra-high resolution X-ray structure of orthorhombic bovine pancreatic Ribonuclease A at 100K
The distribution of Ethanol and Sulphate molecules in Orthorhombic Ribonuclease A Key: S51 is SO41151 etc. and E201 is EOH A201 etc. SO41152 is the active site sulphate and is disordered in two parts A (60%) and B (40%). SO41153 is also disordered in two parts A (50%) and B (50%). The ethanol molecules all ordered with good geometry. Both the sulphates and ethanol molecules are largely located in the external regions of the molecule