Specific immune system (Antibodies)

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Last updated 7:06 PM on 9/10/26
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5 Terms

1
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What is opsonin

Chemicals which bind to pathogen and ‘tag'‘ them so are easily recognised by phagocytes and engulfed

2
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What is the antibody structure

  • Binding site is 110 amino acids long on heavy and light chain called the variable region

  • Y shaped glycoproteins- immunoglobulins

  • Bind to specific antigens ‘lock and key’

  • Heavy chains is identical polypeptide chains and two shorter identical light chains

  • Chains held together by disulphide


<ul><li><p>Binding site is 110 amino acids long on heavy and light chain called the variable region</p></li><li><p>Y shaped glycoproteins- immunoglobulins</p></li><li><p>Bind to specific antigens ‘lock and key’</p></li><li><p>Heavy chains is identical polypeptide chains and two shorter identical light chains</p></li><li><p>Chains held together by disulphide</p></li></ul><p></p>
3
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What is neutralisation

Prevents pathogen from attaching to a host cell by blocking its binding site

<p>Prevents pathogen from attaching to a host cell by blocking its binding site</p>
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What is agglutination

Pathogens are held together by a large antibody with many variable regions, so it is too large to enter a host cell

<p><span>Pathogens are held together by a large antibody with many variable regions, so it is too large to enter a host cell</span></p>
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What is antitoxin

Binds to toxin made by pathogen, makes it harmless