P. berghei (ANKA 2.34) was maintained in Swiss-Webster mice, and when the
parasitemia reached 3%, blood was drawn and cultured overnight at 37°C in
RPMI 1640. The targeting plasmid construct was linearized by KpnI and NotI
restriction digestion, and 10 g of linearized plasmid was used for transfection
using the Amaxa human T-cell nucleofactor kit and the T01 setting