. Author manuscript; available in PMC: 2021 Dec 12.
Published in final edited form as: Prog Biophys Mol Biol. 2020 Oct 25;163:130–142. doi: 10.1016/j.pbiomolbio.2020.10.005
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).