PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25837709-7 2015 Plexin-B1 and -B3 TM helices are regular and tend to associate, whereas plexin-A1, -A2, -A3, -A4, -C1 and -D1 contain sequence elements, such as poly-Glycine or aromatic residues that distort helix conformation and association. polyglycine 145-157 plexin A1 Homo sapiens 72-109