PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
17279631-3	2007	Previously, we used site-directed mutagenesis and functional expression in Xenopus oocytes to identify two pairs of adjacent residues in TMs 7 and 8 of hCNT1 (Ser319-Gln320 and Ser353-Leu354) that, when converted to the corresponding residues in hCNT2 (Gly-Met and Thr-Val, respectively), changed the permeant selectivity of the transporter from cit to cif.	Glycine	253-256	solute carrier family 28 member 2	Homo sapiens	246-251