Used in stem cell research to expand hematopoietic progenitor cells by stimulating Flt3 receptors on the surface of early blood cells. Commonly applied in ex vivo cell culture systems to increase the yield of dendritic cells and other immune cell types for immunotherapy development. Also utilized in regenerative medicine studies and cancer immunotherapy protocols where enhanced production of immune cells is required. The His tag facilitates easy purification and detection during experimental workflows.