MOESM2 of In vitro invasion inhibition assay using antibodies against Plasmodium knowlesi Duffy binding protein alpha and apical membrane antigen protein 1 in human erythrocyte-adapted P. knowlesi A1-H.1 strain

Additional file 2. Microscopic analysis after 10 h post-invasion. Arrows, newly rings; NI, non-immunized IgG.