PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 31861875-8 2019 The lysine-rich polybasic domain (PBD), a region that is unique for K-Ras4B as compared to H- and N-Ras, stabilizes the interaction and accounts for the specificity. tyrosyl-lysine 4-10 NRAS proto-oncogene, GTPase Homo sapiens 98-103