PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16979558-7 2006 The Gr66a mutant exhibited normal tastant-induced action potentials upon presentation of theobromine, a methylxanthine in cocoa. methylxanthine 104-118 Gustatory receptor 66a Drosophila melanogaster 4-9