Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1O2Q
BETA-TRYPSIN2-{5-[AMINO(IMINIO)METHYL]-6-CHLORO-1H-INDOL-2-YL}-6-(CYCLOPENTYLOXY)BENZENOLATECALCIUM IONSULFATE ION
hydrogen bondmanifoldshortarraysmediating