This procedure is optimized for the isolation of 107 to 2 x 108 cells per tube from human peripheral blood mononuclear cells (PBMCs). If working with fewer cells keep volumes as indicated for 107 cells. For best results, optimize the conditions to your specific cell number and tissue. Prepare fresh MojoSort\u2122 Buffer solution by diluting the 5X concentrate with sterile distilled water. To maximize the purity of CD4+ T cells we recommend the depletion of monocytes, as human monocytes express CD4. To deplete monocytes from human PBMCs, we recommend the use of MojoSort\u2122 Human CD14 Selection Kit (Cat. No. 480025\/480026). Alternatively, you may consider the Human CD4 T Cell Selection Kit (Cat. No. 480038). After monocyte depletion proceed to isolate the CD4+ T cells. You can also use other methods to deplete monocytes. If you wish to include monocytes in your CD4+ cell isolation, depletion is not required.