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Q.
Which of the following antibody is pentamer?
AMUAMU 2015Human Health and Disease
Solution:
$IgM$ is the largest antibody in human circulatory system. It is pentameric in nature, i.e. $5\, Ig$ molecules covalently link together via disulphide bonds. As each monomer has $2$ binding sites, so IgM has a total of $10$ binding sites.