Figure 3From: Quantifying CD4 receptor protein in two human CD4+ lymphocyte preparations for quantitative flow cytometry (a) A representative scanning electron microscope image of CD4+ T cells purified from Cyto-Trol control cells (a total of 15 images were recorded): Elongated microvilli can be seen near the perimeter of the cell; (b) A magnified central portion of the CD4+ cell surface showing approximate diameters and length of microvilli. Back to article page