PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
1329948-1	1992	Rhodopsin and all of the vertebrate visual pigments have a carboxylic acid residue, Glu113, in the third transmembrane segment that serves as a counterion to the protonated Schiff base nitrogen of the chromophore.	Carboxylic Acids	59-74	rhodopsin	Bos taurus	0-9