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. 2023 May 12:1–19. Online ahead of print. doi: 10.1038/s41573-023-00692-8

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Fig. 5 — a, The cell lines used. b, The choice of infecting virus strain. c, The various experimental parameters. ACE2, angiotensin-converting enzyme 2; GFP, green fluorescent protein; iPSC, induced pluripotent stem cell; Luc, firefly luciferase; MHV, mouse hepatitis virus; qPCR, quantitative polymerase chain reaction; TMPRSS2, transmembrane protease serine 2.