“…In this case, however, the part that displaces is not the same as the one that gets displaced, as seen in regular domain swapping (Brangulis et al, 2024 ; Cahyona et al, 2020 ; Mascarenhas & Gosavi, 2017 ; Sakai et al, 2023 ). In a recent study, another β‐lactamase, CTX‐M‐9, was shown to form oligomers as the result of the introduction of two Cys residues, and domain swapping was proposed as a mechanism (Villanueva et al, 2024 ). It illustrates that small surface changes can enhance homomeric interactions.…”