FLT3 and neoplasm: When C1498-FLT3 cells was used as the target in the flow cytometric assay, plasma samples from VRP-FLT3 vaccinated mice tended to have overall higher reactivity to the C1498-FLT3 tumor cells than plasma samples from mice vaccinated with PBS or VRP-Ctrl (Figure 6D), although statistical significance was not reached in this assay, unlike clear demonstration of anti-FLT3 antibody production using purified protein in the FLT3 ELISA (Figure 4E).