Definition

A gene that makes a protein that is involved in the formation and growth of new blood cells. Mutated (changed) forms of the FLT3 gene may cause an overactive FLT3 protein to be made. This may cause the body to make too many immature white blood cells. These changes have been found in some types of leukemia, including acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL).