Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1KZI
Thymidylate synthase(2R,3S)-1,4-DIMERCAPTOBUTANE-2,3-DIOL(6S)-5,6,7,8-TETRAHYDROFOLATE2'-DEOXYURIDINE 5'-MONOPHOSPHATE2,3-DIHYDROXY-1,4-DITHIOBUTANECARBONATE...
crystal structurethf complexectsdump