PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
3929074-1	1985	A J-chain was found in the IgM, an 18-S pentameric immunoglobulin, of the skate, Raja kenojei, a cartilaginous fish, by means of gel filtration-column chromatography of reduced and radioalkylated immunoglobulin, followed by alkaline-urea polyacrylamide gel electrophoresis.	alkaline-urea polyacrylamide	224-252	joining chain of multimeric IgA and IgM	Homo sapiens	2-9