<prompt> A 50 year old male suffering from renal failure, underwent kidney transplant. He was prescribed a nucleotide derivative following the organ transplant. The nucleotide derivative of therapeutic impoance in this organ transplant is -Azathioprine5-Fluorouracilcytarabineallopurinol  <response>: Ans. is a i.e., Azathioprine o All of the drugs given in the question are nucleotide analogues. o Out of these drugs only Azathioprine has got significant immunosuppressive propey. So it can be used in the prevention of graft rejection 