PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
986877-8	1976	Vitellogenin mRNA sediments at about 29S in a sucrose-SDS gradient, while albumin messenger peaks at 16S; both species contain poly(A).	Sodium Dodecyl Sulfate	54-57	a1-a	Xenopus laevis	0-12