https://www.ncbi.nlm.nih.gov/Structure/pdb/6PEU
6PEU: Structure of YcaO enzyme from Methanocaldococcus jannaschii in complex with peptide
GLY-ARG-LEU-GLY-PHE-TYR-GLY-TYR-ASP-LEU-GLN-ASPUncharacterized protein MJ1094ADENOSINE-5'-TRIPHOSPHATEMAGNESIUM ION