Crystal structure of Lactobacillus helveticus purine deoxyribosyl transferase (PDT) with the tricyclic purine 8,9-dihydro-9-oxoimidazo[2,1-b]purine (N2,3-ethenoguanine)
4mej is a 3 chain structure with sequence from Lactobacillus helveticus H10. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.