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Expression of LFA-1 receptors on the cell surface of different human peripheral blood leukocytes and the cancer cell line HL-60. The expression of LFA-1 was determined by the reactivity of the cells with monoclonal antibodies against CD11a. The proportion of cells reacting with the antibody (given within brackets) is the mean value of three experiments with each cell type. Representative results of cell distributions obtained by a fluorescence-assisted cell scanner are shown.
