Each antibody binds to a specific antigen in a highly specific interaction analogous to a lock and key.. An antibody (Ab) or immunoglobulin (Ig) is a large, Y-shaped protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as bacteria and viruses, including those that cause disease.

Another word for antibody is immunoglobulin. Antigen vs antibody. An antigen is a foreign substance that enters your body. This can include bacteria, viruses, fungi, allergens, venom and other various toxins.

2025年3月7日 · Antibody, a protective protein produced by the immune system in response to the presence of a foreign substance, called an antigen. Antibodies recognize and latch onto antigens in order to remove them from the body. Learn more about the function and structure of …

2021年3月4日 · Antigen tests. These tests measure antigen proteins from the virus. Material for testing is collected from your nose or throat using a long swab.

2023年8月3日 · Antibody Isotypes: Structure and functions. Antibodies can come in different varieties known as isotypes or classes; There are five isotypes or classes of antibodies differentiated by the aminoacid sequences in the heavy-chain constant regions that confer class-specific structural and functional properties of antibody molecules: IgG, IgM, IgA, IgE, and IgD.

2023年5月1日 · Antibodies are naturally produced by plasma cells within the human body to mediate an adaptive immune response against invading pathogens. There are five predominant antibodies produced, each specialized to execute certain functions. Antibodies gain the ability to identify a diverse range of antigens by genetic recombination of different elements of its …

2025年1月21日 · Immunoglobulin M (IgM) Immunoglobulin M (IgM) is also one of the first antibodies recruited by the immune system to fight infection. IgM populations rise very quickly when the body is first confronted with an infectious organism, and then they plummet as IgG antibodies take over.