 | Acta Crystallographica Section A Acta Crystallographica Section A FOUNDATIONS AND ADVANCES |
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![[Figure 2]](ae5100fig2mag.jpg)
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Figure 2
The exquisite sensitivity of neutrons as a probe for determining the protonation states of histidine, a frequent player in enzyme mechanisms. Left, His24 singly protonated; right, His180 doubly protonated histidine in concanavalin A (PDB code 2yz4; Ahmed et al., 2007  ). This figure was made with Coot (Emsley & Cowtan, 2004). |
![[Figure 2]](ae5100fig2.jpg)
| FOUNDATIONS ADVANCES |
ISSN: 2053-2733
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