sachin has leukemia and his doctor is thinking about giving him the chemotherapy drug purinethol, which is the best drug for this type of leukemia. tpmt is an enzyme that breaks down purinethol in the body so that it doesn't become toxic. sachin's doctor does a genetic test and finds out he has a version of tpmt that has only partial activity compared to most people. what do you expect sachin's doctor will do?
