Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/7CSS 7CSS: Solution structure of the topological isomer of Heat-stable enterotoxin produced by... CYS-CYS-GLU-LEU-CYS-CYS-ASN-PRO-ALA-CYS-THR-GLY-CYS heat stable enterotoxin of the topological isomer