PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
497290-4	1979	The polyamines spermine and spermidine, which are inherently present in the ribosomes, are natural reversible inhibitors of cathepsin R. Upon separation of the enzyme from the inhibitors the proteinase displays a high activity.	Spermine	15-23	endogenous retrovirus group K member 25	Homo sapiens	191-201