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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/).
A closeup of the interactions between PC and key residues at the binding site in SMS1 (a). Two-dimensional interaction map of ligand-protein contacts for SMS1/PC (b) and SMS2/PC (c).