Fig. 4From: Efficient synchronization of Plasmodium knowlesi in vitro cultures using guanidine hydrochlorideParasite multiplication following ring synchronization by GuHCl or density gradient (Nycodenz) centrifugation. Parasitaemia was determined immediately after synchronization and at 36 h later. a–c Represent different biological replicates (A1-H.1 cultures in different human RBCs). Error bars indicate 95% confidence intervalsBack to article page