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Figure 4
The LsAA9_A active site modeled in the joint X-ray/neutron structure at room temperature. (a) 2Fo − Fc electron-density map in light blue contoured at 1.0σ. (b) Fo − Fc neutron scattering-length density omit map for His78 in purple contoured at 3.0σ. His78 is modeled in a single conformation with 75% occupancy. (c) Fo − Fc electron-density omit map for Cl− in dark blue contoured at 3.0σ. The Cl− ion is modeled with 25% occupancy. (d) Fo − Fc neutron scattering-length density omit map for the N-terminal amino group in purple contoured at 3.0σ, indicating that the N-terminal amino group is neutral (NH2).

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
Volume 79| Part 1| January 2023| Pages 1-7
https://doi.org/10.1107/S2053230X22011335
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