A substance that when introduced into the body stimulates the production of an antibody
A foreign substance (almost always a protein) that, when introduced into the body, stimulates an immune response
A substance that when introduced into the body stimulates the production of an antibody Antigens include toxins, bacteria, and foreign blood cells
any substance that stimulates the immune system to produce antibodies Antigens are often foreign substances such as invading bacteria or viruses (See also immunogen )
A substance recognized by the immune system as foreign or toxic which elicits an immune response Antigens include bacteria, viruses, and chemicals If the antigen is part of the same organism, it is called a self antigen An antigen is any protein that can be recognized as foreign and that will generate an immune response
A protein "recognized" by the body as being foreign; it results in the production of specific antibodies directed against it
An antigen is a substance that helps the production of antibodies. a substance that makes the body produce antibodies (antigène, from anti- + -gène (from -genes )). Foreign substance in the body that induces an immune response. The antigen stimulates lymphocytes to produce antibodies or to attack the antigen directly (see antibody;immunity). Virtually any large foreign molecule can act as an antigen, including those of bacteria, viruses, parasites, foods, venoms, blood components, and cells and tissues of various species, including other humans. Sites on the antigen's surface fit and bind to receptor molecules on the lymphocytes' surface, stimulating the latter to multiply and initiate an immune response that neutralizes or destroys the antigen
a foreign substance in the body such as protein, bacteria, virus, pollen, and other material Antigens stimulate the body to produce antibodies, which then fight them
Substances such as toxins, enzymes or foreign molecules that cause an immune response by antibodies; a substance that, when introduced into the body, induces an immune response by a specific antibody
A protein or other molecule that can elicit an immune response; the antibody protein that is produced binds to the antigen
Foreign substances (e g bacteria or viruses) in the body that are capable of causing disease The presence of antigens in the body triggers an immune response, usually the production of antibodies
Any substance that when introduced into the body (such as the protein coat of an invading pathogen) causes the formation of antibodies Ag is also found on tissue and blood cells, and in body fluids Measurement of antigen can help determine whether a particular disease will become active
a substance that can trigger an immune response causing the production of antibodies as part of the body's defense against infection and disease
Substance, usually a protein, that when introduced into the body causes the body to make an antibody, usually specific to the antigen
A substance that can elicit the formation of an antibody when introduced into the body
A foreign molecule or substance, such as a transplant, that triggers an immune response This response may be the production of antibodies
A foreign macromolecule that does not belong to the host organism and that elicits an immune response
Anything introduced into the body that is seen as foreign An antigen stimulates the immune system into producing cells that attack it Hepatocellular carcinoma: Cancer of the liver A malignant tumour arisisng in the liver In most cases, it occurs as a complication following cirrhosis
any substance (as a toxin or enzyme) that stimulates the production of antibodies
An antigen is any substance that the body regards as foreign and which therefore triggers an immune response; antigens are usually proteins associated with bacteria and viruses
An antigen is a substance that can trigger an immune response, resulting in production of an antibody as part of the body's defense against infection and disease Many antigens are foreign proteins (those not found naturally in the body) An allergen is a special type of antigen which causes an IgE antibody response
A foreign substance that can trigger an immune system response, resulting in production of an antibody as part of the body's defense against disease
{i} foreign substance which stimulates the production of antibodies when introduced into a living organism
In the testing of cell surface antigens, a serological specificity that is poor or broad relative to other specificities and can be defined as 2 or more split antigens.(Example: HLA-B51 and HLA-B52 are split antigens of the HLA-B5 broad antigen)Okimoto K, Juji T, Ishiba S, Maruyama H, Tohyama H, Kosaka K. HLA--Bw54 (Bw22-J, J-1) antigen in juvenile onset diabetes mellitus in Japan. Tissue Antigens 1978 11(5): 418–22 pmid=694905
In the testing of cell surface antigens, an antigen that has a more refined or specific cell surface reaction relative to a broad antigen.(Example: HLA-B51 and HLA-B52 are split antigens of HLA-B5)Okimoto K, Juji T, Ishiba S, Maruyama H, Tohyama H, Kosaka K. HLA--Bw54 (Bw22-J, J-1) antigen in juvenile onset diabetes mellitus in Japan. Tissue Antigens 1978 11(5): 418–22 pmid=694905
Any of the genetically determined antigens on the surface of cell membranes that identify a cell as self or nonself and that determine whether a tissue graft will be accepted by an organ transplant recipient
Substances that cause an immune response in the body The body "sees" the antigens as harmful or foreign To fight them, the body produces antibodies, which attack and try to eliminate the antigens
Substances, such as proteins, that can trigger an immune response, for example, the production of an antibody The antigens of the ABO blood group system are examples
Foreign substances in the body that are capable of causing disease The presence of antigens in the body triggers an immune response, usually the production of antibodies Antigens may be soluble substances, such as toxins and foreign proteins, or particulate, such as bacteria and tissue cells; however only the portion of the protein of polysaccharide molecule known as the antigenic determinant combines with antibody or a specific receptor on a lymphocyte
{i} CEA, antigen found in an increased amount in the blood of people who suffer from certain cancers (such as colon cancer) or other diseases and in the blood of heavy smokers
Any of the genetically determined antigens on the surface of cell membranes that serve to identify a cell as self or nonself. These antigens determine whether a tissue graft will be accepted by an organ transplant recipient
a protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer