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. 2020 May 22;56(2):106028. doi: 10.1016/j.ijantimicag.2020.106028

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Fig 4 — Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) entry occurs via the angiotensin-converting enzyme 2 (ACE2), the sialic acid receptor, the transmembrane serine protease 2 (TMPRSS2) and CD147. The viral spike protein binds to receptor(s) present on the cell surface of host cells and enters the cell. CQ, chloroquine.