[[Image:IgE.jpg|thumb|right|150px|IgE - B. Catchpole, RVC 2008]]
[[Image:IgE.jpg|thumb|right|150px|IgE - B. Catchpole, RVC 2008]]
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<p>Unlike [[IgM]], IgG and [[IgA]], IgE does not function as a soluble antibody and is found in low levels in blood plasma. Like [[IgA]] it is produced by plasma cells and is mainly localised to mucosal surfaces.</p>
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<p>Unlike [[IgM]], [[IgG]] and [[IgA]], IgE does not function as a soluble antibody and is found in low levels in blood plasma. Like [[IgA]] it is produced by plasma cells and is mainly localised to mucosal surfaces.</p>
==Structure==
==Structure==
<p>IgE is Y-shaped with heavy chain type ε, and exists as a monomer.</p>
<p>IgE is Y-shaped with heavy chain type ε, and exists as a monomer.</p>