. Author manuscript; available in PMC: 2022 Jan 20.
Published in final edited form as: J Mol Biol. 2020 Nov 20;433(6):166720. doi: 10.1016/j.jmb.2020.11.019
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).