ALEXA FLUOR 647 Mouse anti-Virus HBeAg (2E9) Monoclonal Antibody, ALEXA FLUOR 647 Conjugated [IgG]

Hepatitis B; Core antigen; Core protein; HBe antigen; HBeAg; HBVgp4; Pre C,C; Precore protein; Precore/core; Precore/core ORF; Precore/core protei; HBEAG_HBVD3; External core antigen; HBeAg; p25.

Hepatitis B e-antigen (HBeAg) is a viral protein associated with HBV infections. Unlike the surface antigen, the e-antigen is found in the blood only when there are viruses also present. When the virus goes into hiding,_ the e-antigen will no longer be present in the blood. HBeAg is often used as a marker of ability to spread the virus to other people (infectivity). Measurement of e-antigen may also be used to monitor the effectiveness of HBV treatment; successful treatment will usually eliminate HBeAg from the blood and lead to development of against e-antigen (anti-HBe). There are some types (strains) of HBV that do not make e-antigen; these are especially common in the Middle East and Asia. In areas where these strains of HBV are common, testing for HBeAg is not very useful.