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What are antigen types?
Some antigen types include bacterium and immunogen.
What is the difference between antigen and immunogen?
Any foreign particle interact with Antibody or T cell is antigen. Interaction is non-covalent and highly specific. Antigen that evoke immune response is called Immunogen. An immunogen usually has a fairly high molecular weight (usually greater than 10,000), thus, a variety of macromolecules such as proteins,lipoproteins, polysaccharides, some nucleic acids, and certain of the teichoic acids, can act as immunogens.
Differences between immunogen and antigen?
An Antigen is considered as any foreign particle that enters the body such as dust, food and any microorganisms. An Immunogen is any foreign particle that triggers an response from the body's immune system. Consequently, all Immunogens are Antigens, but not all Antigens are Immunogens. To be considered an Immunogen, the particle has to have all the following characteristics: 1- Has enough atomic mass to be recognized by T cells and Antigen Presenting cells 2- Be significantly different from all of our cells or metabolites. 3- Must have a defined secondary and tertiary structure (has to be firm to form an epitope) 4- Has to be an antigen eg: Carbohydrates are not a highly immunogenic antigen, since they are made of glucose which is essential for our body's metabolism. Moreover, our body has the ability to store glucose as glycogen. An Adjuvant is a compound that increases the immunogenicy of antigens when mixed together.
Is an antibodie an antigen?
An antibody is a glycoprotein that is produced by plasma cells. It consists of heavy chains and light chains. An antigen is a molecule that interacts with an antibody (or T-Cell). When the antigen interaction induces an immune response it is known as an immunogen.
What is the most effective immunogen?
the most effective immunogen is proteins
What is the function of adjuvant in immune response?
When mixed with an immunogen, it enhances the immune response against the immunogen
What is the difference between an antigen and pathogen?
An antigen is a substance that can trigger an immune response in the body, such as proteins on the surface of bacteria or viruses. A pathogen, on the other hand, is a type of antigen that can cause disease in the host organism by invading and damaging tissues. Not all antigens are pathogens, but all pathogens are antigens.
All immunogens are antigens but all antigens are not immunogens-explain?
Let's start with the first phrase: "All immunogens are antigens" Yes, that's true. Immunogens are antigens that CAN ELICIT IMMUNE RESPONSE and percieved as foreign by the body. Remember, anything that is percieved by the body as foreign is an antigen. Period. Now the second phrase: "All antigens are not immunogens" This is also true. There are antigens, percieved by the body as foreign that CANNOT ELICIT IMMUNE RESPONSE. Example of this is Hapten Molecule. It is an antigen that cannot elicit response by itself, unless paired with a larger protein. In summary: Immunogens - form of antigens that can elicit response. Antigens - anything percieved by the body as foreign that can either elicit or not (Hapten molecule) an Immune response.
Can any antibody work with any antigen?
No, not all antibodies can work with any antigen. Antibodies are highly specific in recognizing and binding to a particular antigen based on their unique binding sites. The binding of an antibody to an antigen is based on complementary shapes and charges, so a specific antibody will only bind to a specific antigen that matches its binding site.
What is the role of antibodies in the body response to infection?
Antibodies are basically all the same except for a tip that recognizes the corresponding antigen. When the antibody finds this antigen it locks on and targets the virus.
Does a person get sick every time exposed to an antigen?
No. You are exposed to antigens all day every day. If you are allergic to the antigen then you may have an allergic reaction or not depending on a lot of factors such as the manner of exposure and the level.
What are factors affecting antigenicity?
mention factors affecting antigenicity 1) molecular weight of antigen. e.g. protein is a good antigen as compare to lipid or nucleic acid. 2) invecivness of antigen, that is due to toxins or chemicals secreted by the antigen 3) degredibility: antigen should be degreted in body so that body immune system can react against them. 4) complexicity of antigen
