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A smoothed contour plot for CD62L versus CD44 expression. The CD4+ population (left panel) is comprised of two populations: a CD62L+CD44med subset and a CD62L−CD44high subset. The CD62L−CD44high subset was eliminated from the CD4+CD62L+ population (right panel) upon sorting using an anti-CD62L antibody. The contours are colored by density estimation.
