PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1993480-3 1991 The conformation is constrained by two disulphide bridges between Cys1-Cys15 and Cys3-Cys11 but the NMR data and computed conformers show additional helical structure between residues Leu6 and Cys11. disulphide 39-49 cystin 1 Homo sapiens 66-70