Fig. 1

Outline of the PIGRET assay procedure. First, stain RBCs with PE-conjugated anti-CD71 Abs and mixed with anti-PE magnet particles. Enrich CD71 positive reticulocytes using cell separation magnet(s) by a positive selection method. Next, stain the enriched RETs with APC-conjugated anti-HIS49 Ab and FITC-conjugated anti-CD59 Ab. Finally, using FCM, CD71 and HIS49 double-positive cells are analyzed for CD59 expression, and Pig-a mutant cells are detected as the FITC-negative population