“…Long-ranged interactions between different sites within a given protein are critically important for protein function ( Peters and Lively, 1999 ; Bershtein et al, 2006 ; Collins et al, 2006 ; Ekeberg et al, 2013 ; Levy et al, 2017 ; Harrigan et al, 2018 ; Otten et al, 2018 ; Rojas Echenique et al, 2019 ; Shimagaki and Weigt, 2019 ; de la Paz et al, 2020 ; Rizzato et al, 2020 ; Yang et al, 2020 ; Bisardi et al, 2022 ) and for the CoV-2 S protein in particular ( Zeng et al, 2020 ; Castiglione et al, 2021 ; Dong et al, 2021 ; Garvin et al, 2021 ; Nielsen et al, 2022 ; Ramarao-Milne et al, 2022 ; Rochman et al, 2022 ; Rodriguez-Rivas et al, 2022 ). By showing dynamic differences between the interactions of CAPs, which have likely played a major role in allowing the virus to infect human hosts, the binding site, and the characteristic mutations of dominant Delta and Omicron strains, we see a ‘fine-tuning’ of protein behavior.…”