Source:http://linkedlifedata.com/resource/umls/id/C1323321
GO: Combining with a J-chain-containing polymeric immunoglobulin of the IgA or IgM isotypes via the Fc region, and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. [GOC:add, GOC:signaling, ISBN:0781735149]