Antigens are typically present on any cell, bacterium, or virus.
No, O blood does not have any antigens present.
Yes, AB blood has both A and B antigens present on the surface of red blood cells.
An antibody can typically bind to two antigens at once.
Yes, serum does contain antigens
Yes, A positive blood contains A antigens on the surface of the red blood cells. Additionally, the "positive" indicates the presence of the Rh factor, meaning the Rh antigen is also present. Therefore, A positive blood has both A and Rh antigens.
The immune system recognizes antigens present within infectious organisms/viral particles/tumor cells. These antigens are typically proteins, but can be complexed with lipids or carbohydrates. Nucleic acids can be targeted by the immune system, but they are not distinct enough to act as appropriate antigens.
The blood type notation A Rh- indicates which antigens and antibodies are present in the blood. A indicates there are A antigens. Rh+ indicates there are Rh antigens. B antibodies. If there are A and Rh antigens but no B antigens, the antibodies in the blood plasma are B antibodies.
Self-antigens
gamma globulins
Your blood type is determined by antibodies (both/either A and B), and Antigens present (both/either A and B) in your Red Blood Cells. O blood types have both A and B antibodies, and neither A or B antigens. If you are O+ it means you can give blood to anyone. If you are O- it means you can recieve any blood type.
Im guessing that the testing medium contains antigens which bind to a receptor only present on the drug in question, or a range of drugs with a range of antigens.
Antigens determine a person's blood type. These antigens are present on the surface of red blood cells and stimulate the immune system to produce antibodies against incompatible blood types.