FLT3 is a receptor tyrosine kinase of 130-155 kDa expresssed on normal bone marrow stem and early progenitor cells and on leukemic blasts from patients with acute leukemias. The FLT3 ligand, FL, is a new cytokine which acts on hematopoietic progenitors in synergy with other cytokines. FLT3 transduces FL-mediated signal through interaction with a number of cytoplasmic substrates.
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Rosnet et al. (2009) studied this question.