Flow cytometric analysis with anti–IL-15 M112 antibody. Human peripheral blood purified monocytes (MONOCYTES) and T lymphocytes (LYMPHOCYTES), human monocytic cell lines (MONO-MAC-6, THP-1, U937), and a human T-cell leukemia line (JURKAT) were stained with M112 MoAb followed by goat antimouse FITC-conjugated antibody. Fluorescence intensity is represented by white histograms; black histograms refer to the background staining of isotype-matched control MoAb. Data show one representative of five independent experiments.