Drug Gene Type Source fludarabine phosphate RRM2 - D1 PubChem fludarabine phosphate POLD1 - D1 PubChem fludarabine phosphate POLA1 - D1 PubChem fludarabine phosphate RRM2B - D1 PubChem fludarabine phosphate POLE - D1 PubChem fludarabine phosphate RRM1 - D1 PubChem