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|IgA immunoglobulin complex, circulating
| A protein complex composed of two identical immunoglobulin heavy chains of an IgA isotype and two identical immunoglobulin light chains, held together by disulfide bonds, sometimes complexed with J chain or J chain and secretory component, and present in the extracellular space, in mucosal areas or other tissues, or circulating in the blood or lymph.
[GOC:add, ISBN:0781765196, PMID:16362985]
| Note that an IgA immunoglobulin complex has the function of antigen binding if a suitable antigen is available.
| GO:0032991 protein-containing complex
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