Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1F4D 1F4D: CRYSTAL STRUCTURE OF E. COLI THYMIDYLATE SYNTHASE C146S, L143C COVALENTLY MODIFIED AT C143... THYMIDYLATE SYNTHASEGLYCEROLN-[TOSYL-D-PROLINYL]AMINO-ETHANETHIOLSULFATE ION