4hcb is a 4 chain structure with sequence from Escherichia coli DH5alpha. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
EX1_ECOLI Also functions as a DNA deoxyribophosphodiesterase that releases deoxyribose-phosphate moieties following the cleavage DNA at an apurinic/apyrimidinic (AP) site by either an AP endonuclease AP lyase.