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A and B substates of the Asn-12 side chain in crambin coupled to the A and B water networks at 130 K. Note that the electron density for the water A and B substates are well separated for W105 and W119. Hydrogen bonds drawn as dotted lines are all between 2.75 and 3.11 Å. Electron density (2Fo − Fc) is contoured at the 2σ level.
