PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15929008-0 2005 1H, 15N and 13C Resonance assignments and secondary structure determination reveal that the minimal Rac1 GTPase binding domain of plexin-B1 has a ubiquitin fold. 15n 4-7 Rac family small GTPase 1 Homo sapiens 100-104