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Low frequencies of CXCR5+ CD8 T cells in lymph nodes. Flow cytometry of PBMC and lymph node samples collected from an infected rhesus macaque is presented with CD8 or CD4 staining on the y axis and recombinant human CXCR5 (rhCXCR5) on the x axis. Frequencies of CXCR5+ T cells are provided in the upper right dot plot quadrant.
