PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23091056-5 2012 Human Ric1 and Rgp1 both bind Rab6A with preference for the GDP-bound conformation, characteristic of a GEF. Guanosine Diphosphate 60-63 Ras protein specific guanine nucleotide releasing factor 1 Homo sapiens 104-107