| Front | Antibodies 4.1.1(h) |
|---|---|
| Back | Antibodies (Y shaped glycoproteins called immunoglobulins) bind to specific antigen on pathogen or toxin that has triggered immune response, specific antibody for each antigen, made up of 2 identical long polypeptide chains (heavy chains) and 2 shorter identical chains (light chains), chains held by disulfide bridges (also polypeptide chains), antibody binds to antigen via lock and key, forming antigen - antibody complex, hinge region provides flexibility so it can bind 2 seperate antigens, one at each site |
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