Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/6LYH 6LYH: Crystal structure of tea N9-methyltransferase CkTcS in complex with SAH and... N-methyltransferase CkTcS1,3,7-trimethyl-9H-purine-2,6,8-trioneS-ADENOSYL-L-HOMOCYSTEINE