PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6310406-3 1983 As a result of interaction with a rhodopsin photoproduct (possibly metarhodopsin II380), this GTP-binding protein exchanges a previously bound GDP for a GTP. Guanosine Diphosphate 143-146 rhodopsin Homo sapiens 34-43