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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,B) are changes of hydrogen bond lengths in tetrad 1 during the MD simulation of K-GQ. (C–F) are typical structures of tetrad 1 in experiment, and MD simulation with Drude, AMOEBA, and OL15, respectively. (A,B) share the same figure legend.