?:definition
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Serology reagents intended to detect and/or identify antigens or serum antibody titers to hepatitis B virus X protein. Hepatitis B viruses are DNA viruses of the genus Hepadnavirus, family Hepadnaviridae; the X protein may have a function in the life cycle of Hepadnaviruses and in the carcinogenic process related to them. Hepatitis B virus may cause hepatitis, a disease characterized by jaundice and the increase of some enzymes in serum (e.g., aspartate aminotransferase); these viruses may be transmitted percutaneously (e.g., via body piercing, tattooing), parenterally, from mother to child at birth, or by intimate (e.g., sexual) contact.
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