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. 2019 Dec 11;91(3):636–642. doi: 10.3382/ps.2011-01916

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© 2012 Poultry Science Association Inc.

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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SDS-PAGE and Western blot assay. A) SDS-PAGE of purified IgY (lane M, standard protein molecular weight markers; lane 1, IgY antibody); B) SDS-PAGE of purified nucleocapsid antigen (lane M, standard protein molecular weight markers; lane 1, nucleocapsid antigen); C) Western blot assay of nucleocapsid antigen probed with anti-severe acute respiratory syndrome-associated coronavirus nucleocapsid IgY (lane 1, nucleocapsid antigen). Color version available in the online PDF.