1-Response is antigen-dependent 2-There is a lag time between exposure and maximal response 3-Antigen-specific 4-Exposure results in immunologic memory
Antigens.
Abwehrstoff or Antigen
the antigen must bind to the receptor
Reference ranges for the antigen/antibody tests are as follows: hepatitis A antibody, IgM: Negative, hepatitis B core antibody: Negative, hepatitis B e antibody: Negative, hepatitis B e-antigen: Negative.
The O antigen is not an antigen that may be found on the surface of an erythrocyte. A and B antigens are present in the ABO blood group system, while the Rh antigen is part of the Rh blood group system. O blood type individuals lack A and B antigens on their red blood cells.
An antigen is a substance that can invoke an immune response. While an antibody is the immune system's response to an antigen. Antibodies, act by directly neutralizing the antigen and/or bind to the antigen and signaling marcophages to phagocytose the antigen.
An antigen is a protein made in response to a specific antigen.
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
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.
No.
Surface antigen