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. 2021 Nov 26;500:113195. doi: 10.1016/j.jim.2021.113195

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© 2021 Published by Elsevier B.V.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 2 — Monoclonal antibody-mediated blockage of RBD_r4-HRP and hFc-ACE-2 binding. Inhibition (%) = (1- A450Inh / A450Max) × 100, where A450Inh means the MAbs inhibition to the binding of RBD_r4-HRP and hFc-ACE-2 and A450Max means the A450nm of the conjugate without preincubation with antibodies. Data are the mean of duplicate measurements ± SD.