The protein acts like an antigen , prompting the immune cells to attack.
When the synthetic peptide was used as the antigen , a monoclonal antibody was obtained.
Once antibodies have been produced for a particular antigen they tend to remain in the body.
This is a complicated process involving antigens and antibodies.
As described above, it allows antigenic variation in its antigens to evade the host immune system.
As one would expect, we found that two different antibodies with different antigenic specificities had different amino acid sequences in the antigen-binding site.
Alternate methods of diagnosing pneumococcal disease are based on the detection of bacterial antigens in body fluids.
Finally, the target antigens of the locally produced antibodies have not been fully identified.
The immune system of a human can differentiate more than one million different foreign proteins, or antigens .
Early risk may suggest a mechanism involving an aberrant immune response to cereal antigens in an immature gut.