<prompt> True about Azathioprine is?It has more anti tumor effect than immunosuppressant effectIt is not a prodrugIt selectively affects differentiation of T cellsIt is a pyramidine antimetabolite  <response>: ANSWER: C It selectively affects differentiation of T cellsREF: KDT 6th ed p. 840AZATHIOPRINEPurine antimetaboliteMore marked immunosuppressant effect than antitumour effectIts a prodrug and converted to more active 6-mercaptopurineSelectively inhibits T cell differentiation and function of T cellsMost important application - graft rejectionse - bone marrow suppression 