Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1SBW 1SBW: CRYSTAL STRUCTURE OF MUNG BEAN INHIBITOR LYSINE ACTIVE FRAGMENT COMPLEX WITH BOVINE... PROTEIN (BETA-TRYPSIN)PROTEIN (MUNG BEAN INHIBITOR LYSIN ACTIVE FRAGMENT)CALCIUM IONSULFATE ION