An enzyme released from liver cells. A blood test that reveals ALT levels above normal may indicate liver damage. Organic compounds that link together to build the proteins our bodies are made of. A protein molecule produced by cells of the immune system in response to a foreign body, such as a virus or bacteria.
Antibodies circulate in the blood to protect against infection.
Its presence in the bloodstream often indicates HCV infection. A foreign substance that the body's immune system identifies as potentially harmful, resulting in the production of antibodies to fight it. A virus protein is considered an antigen. An enzyme released from liver cells. A blood test that reveals AST levels above normal may indicate liver damage.