PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
17893327-8	2007	Using nucleotide analogues, we show that AID"s WRC preference (W = A or T; R = A or G) involves the recognition of a purine in the R position and that the carbonyl or amino side chains of guanosine negatively influence specificity at the W position.	Guanosine	188-197	activation induced cytidine deaminase	Homo sapiens	41-44