PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
21543324-7	2011	Nevertheless, the catalytic cysteine and histidine residues constitute an active site that is highly similar to these in papain-like and nsP2 proteases.	Histidine	41-50	reticulon 2	Homo sapiens	137-141