Antigen binding site or epitope is a part of an antigen that is recognized by the antibody.
Paratope is a part of an antibody that binds on epitope.
Antigen binding is a region on an antibody that binds to antigens. Antigen binding is composed of one constant and one variable domain of each of the heavy and the light chain, and these domains shape the antigen binding site at the amino terminal end of the monomer.
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.
different between late and early binding
Antibodies bind the antigen, which then targets the antigen for elimination by innate mechanisms
neutralization of the antigen, agglutination or precipitation, and complement activation.
In the context of antibody structure, heavy chains are larger and provide structural support, while light chains are smaller and help with antigen binding.
Imunocompetent
Polyclonal antibody
The part of the antibody that binds to the antigen is called the antigen-binding site, which is located at the tips of the Y-shaped structure of the antibody. This site is formed by the variable regions of both the heavy and light chains, allowing it to specifically recognize and bind to a particular antigen. The unique structure of the antigen-binding site is determined by the amino acid sequence, which varies between different antibodies, enabling the immune system to target a wide range of pathogens.
Has no antigen in many textbooks it will state "no A-antigen and no B-antigen"(which imply the possibility of some other antigen) and some will even say, "no antigen" (which is true; antigens are things that attach to antigen binding sites, thus, if it does not fit any antigen binding sites, it is technically not a antigen but merely a "enzyme/protein") but this is just to reduce unnecessary and irrelevant information; they are only concerned about A-antibody, B-antibody, A-antigen, and B-antigen. Nonetheless, know that there are in fact antigens on o blood cells, they are just inactive. My guess is, N acetyl glactosamine on A antigen and Galactose on B antigens are Epitopes (: a small specific regions on antigens that are bound by the antigen receptors on lymphocytes and by secreted antibodies.) Antigens without epitopes will not be detected by antigen binding sites.
Complemented
The process by which an antibody binds to an antigen is called antigen-antibody binding. This occurs when the antibody recognizes and attaches to a specific part of the antigen, forming a complex that helps the immune system identify and neutralize the antigen.