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. 2004 Mar 8;1:2. doi: 10.1186/1742-4690-1-2

Figure 1.

Figure 1

Flow cytometric analysis of the membrane expression of CD4, CCR5 and CXCR4 in the U87.CD4.CCR5.CXCR4 double-transfected cell line (3 panels, left column) and in the single-transfected U87.CD4.CCR5 cell line (3 panels, central column) and U87.CD4.CXCR4 cell line (3 panels, right column). The gray curves represent staining by the specific CD4 (clone SK3), CXCR4 (clone 12G5) and CCR5 (clone 2D7) monoclonal antibodies in, respectively, the upper, central and lower row. The mean fluorescence intensity (MFI) of the CD4, CXCR4 and/or CCR5 positive cells is indicated in the right hand corner of each histogram. Aspecific background fluorescence is indicated by the white peaks.