hepatitis B core antigen

hepatitis B core antigen
(HBcAg) a core protein antigen of the hepatitis B virus present inside complete virions (Dane particles) and in the nuclei of infected hepatocytes, indicating the presence of replicating hepatitis B virus; the antigen is not present in the blood of infected individuals, but anti-HBc antibodies appear during the acute infection; they do not protect against reinfection.

Medical dictionary. 2011.

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