Collect 4x107 procyclic form cells, spin down 1300xg, 10’. Resuspend cells in 100ul room temp parasite kit 1 Nucleofector solution (that had the supplement added). Mix this solution with 10ug DNA. Transfer cells/DNA into certified cuvette (make sure there is no air bubbles). Select nucleofector program X-0001. Insert the cuvette into the nucleofector cuvette holder and apply selected program. Take the cuvette out of the holder, add 500ul of equilibrated culture medium (w/15% FBS) and transfer the sample into a culture flask. Add to 30ml media. Make 1:20 dilution (1.5ml +28.5ml media). Aliquot 1ml of each into 24 well plate. Let sit in incubator overnight and add 1ml of media +2X selection into each well.