Illustration of immunoglobulin M (IgM), an antibody that responds to antigens during the initial exposure of an infection. IgM is produced by B cell white blood cells, and is the largest antibody in the circulatory system. It consists of five monomers covalently bonded to form a pentamer.

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Photo credit: © FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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