NCIt definition : A mutation in the region of the FLT3 gene that encodes the second tyrosine kinase
domain of the receptor-type tyrosine-protein kinase FLT3 that causes the stabilization
of the activation loop of the kinase domain. FLT3 activation loop mutations lead to
constitutive tyrosine kinase activity and are associated with acute myeloid leukemia.;
NCIt note : The majority of FLT3 activation loop mutations involve the deletion of or point mutations
in codon 835 (aspartate 835) or point mutations in codon 836 (isoleucine 836).;