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Figure 7
Exemplary 2mFoDFc electron densities at 1.5σ for the structures of proteinase K (a) and thermolysin (b) derived from crystals grown on Roadrunner I chips. The Ca2+-binding site of proteinase K and the active site of thermolysin with two bound Zn2+ ions (gray spheres) are shown. Residues that are involved in ion binding and/or are functionally important are represented as sticks and labeled. For a more detailed discussion on the thermolysin structure, please see the supporting information.

IUCrJ
Volume 6| Part 4| July 2019| Pages 714-728
ISSN: 2052-2525