EntityQ7444455· pop 5· linked from 8 articlessecretory componentSign in to saveextracellular moiety of the polymeric immunoglobulin receptor found alone, or complexed with IGA or IGM, in a variety of external secretions (tears, bile, colostrum)ConnectionsJCHAINEntityInternational Standard Book NumberEntitydigital object identifierEntitybreastfeedingEntityplasma membraneEntityQ180686EntitybibcodeEntityQ229883EntityMedical Subject HeadingsEntityproteolysisEntityimmunoglobulin AEntitylumenEntitytranscytosisEntityprotein dimerEntityimmunoglobulin heavy chainEntityimmunoglobulin light chainEntityPIGREntityCategoriesAntibodies