PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
19448746-4	2009	Residues E136, H138, Y248, and D249 of ytCBS were also targeted as they correspond to identical polar residues lining the mouth of the active site in the structure of human CBS.	y248	21-25	cystathionine beta-synthase	Homo sapiens	41-44