Flow cytometric analysis of CCR7 (CD197) on Human peripheral blood leukocytes and lymphocytes. Whole blood was stained with BD Horizon™ BUV395 Mouse Anti-Human CD4 (clone RPA-T4, Cat. No. 564724), APC Mouse Anti-Human CD8 (clone RPA-T8, Cat. No. 561952, 561421, 555369, or 561953), FITC Mouse Anti-Human CD45RA (clone HI100, Cat. No. 561882 or 555488), and either BD Horizon™ BV605 Mouse IgG1, κ Isotype Control (Cat. No. 562652) or BD Horizon™ BV605 Mouse Anti-Human CCR7 (CD197) (Cat. No. 566754 or 566755). The erythrocytes were lysed with BD PharmLyse™ Lysing Buffer (Cat. No. 555899). Flow cytometry and data analysis were performed using a BD FACS LSRFortessa™ X--20 Flow Cytometer and FlowJo™ Software.
Plots 1 and 2: The contour plots showing Ig isotype control or CCR7 (CD197) staining versus side light-scatter were derived from gated events with the forward and side light-scatter characteristics of viable leukocytes.
Plot 3: The contour plot showing CCR7 (CD197) staining versus CD45RA was derived from CD4-positive T cell gated events with the forward and side light-scatter characteristics of viable lymphocytes. Please note that we have observed considerable donor-to-donor variation in the proportion of CCR7 (CD197)-negative CD4-positive lymphocytes.
Plot 4: The contour plot showing CCR7 (CD197) staining versus CD45RA was derived from CD8-positive T cell gated events with the forward and side light-scatter characteristics of viable lymphocytes.