Questions tagged [antigen]

An antigen is a substance which causes the the body to produce a reaction of the adaptive immune system. Contact of the immune system to antigens results in the production of highly specific (antigen specific) antibodies.

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Minimum size for a peptide/protein to be immunogenic in human?

What is the minimum size for an (injected) peptide/protein to cause immunogenic response in human? A reference is very helpful, as well. Thanks in advance
biofan
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What happens to the molecules of the pathogens after phagocytosis?

For example, what happens when a bacterium gets digested by a macrophage? I suppose that the macrophage produces the presented antigen from leftovers from the digested bacterial particles. What happens to the rest of the bacterium? Can the molecules…
Aun
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Are antibodies and hepatitis viruses of similar adaptability?

Antibodies and Hepatitis viruses both have hypervariable regions. Is one more adaptable than the other? Precisely how adaptable are they? I have read that antibodies can be trained to bind to almost any antigen, is the same true for Hepatitis?…
Dale
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