A Lab question antibody recognition

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To distinguish different antibodies in a blood sample, one can utilize techniques such as ELISA or Western blotting. Antibodies are present in all bodily fluids, with IgM being the first class produced in response to antigens, while IgD is less common and not well understood. The heavy (H) and light (L) chains of antibodies are linked by disulfide (S-S) bonds, including connections to the J-chain. Chain polymorphism and heterogeneity do not affect antibody specificity. Understanding these aspects is crucial for effective antibody analysis in laboratory settings.
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Given a sample blood, what would you do to distinguish different antibodies (MGEAD)?
Also, I am curious as to how the H and L chains are formed ? I can't find any clues in my textbook, please help.
Thanks
 
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Hint: antibodies can be found in all bodily fluids not only in blood, IgM class is the first one to be made after ImmuneSystem's triggered by antigen's proteins. Not many IgD's are found in the sample fluid and little is known about them although their presence is of essence. Also, H and L link together by S-S bonds, (including too the J-chain). Chain polymorphism as well as heterogeneity has no concerns to antibody specificity.
 
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