PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
19508234-0	2009	The 5" terminal uracil of let-7a is critical for the recruitment of mRNA to Argonaute2.	Uracil	16-22	argonaute RISC catalytic component 2	Homo sapiens	76-86