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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Heterocyclic α-amino ketones as a promising inhibitor class, showing the main interactions, from left to right: aromatic heteroatom accepting a H-bond from G39 or R399; ketone accepting a H-bond from N202; α-amino group in the vicinity of the PLP cofactor.