FLT3LG and melanoma: Different sources of Flt3L can be used, for example, recombinant Flt3L (Peprotech), Ig stabilized Flt3L (BioXcell), or supernatant of cell lines stably transfected with Flt3L e.g. CHO-Flt3L-FLAG cells (Tracy Willson, The Walter and Eliza Hall Institute (WEHI), Melbourne, Victoria, Australia) or B16-F10 melanoma cells [9].