Fig. 3
Comparison of electron density maps from proteinase K structures obtained from different diffraction methods showing the calcium binding site with the coordinating water molecules. a Structure obtained from our single shot pink-beam serial crystallography experiment. b Proteinase K structure from conventional single crystal rotation photographs (PDB ID: 2PRK). The blue grid represents 2mFo − DFc maps (left side) and 2mFo − DFc simulated annealing composite omit maps (right side) both at a contour level of 1.5σ, respectively
