REX is located in the Maurer’s clefts. Panel 1 depicts nuclear staining (blue) of a field of 3D7 parasites. Panel 2 depicts the same field stained with REX antiserum (green). Panel 3 is the same field stained with MAHRP-1 antiserum (red). Panel 4 is a merge of the first three panels. Hawthorne PL, Trenholme KR, Skinner-Adams TS, Spielmann T, Fischer K, Dixon MW, Ortega MR, Anderson KL, Kemp DJ, Gardiner DL. A novel Plasmodium falciparum ring stage protein, REX, is located in Maurer's clefts. Mol Biochem Parasitol. 2004 136(2):181-9.