PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27038031-3 2016 IgM can exist as a pentamer with a connecting singly N-glycosylated J-chain (with a total of 51 glycosylation sites) or as a hexamer (60 glycosylation sites). Nitrogen 53-54 joining chain of multimeric IgA and IgM Homo sapiens 68-75 15294089-6 2004 It was found that an N-glycosylation consensus site of the J-chain was functional, and intracellular J-chain was endoglycosidase H sensitive. Nitrogen 21-22 joining chain of multimeric IgA and IgM Homo sapiens 59-66