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B7.2 expression on macrophages by immunofluorescence analysis. B7.2 expression by immunofluorescence analysis (a) on primary cultures of rheumatoid arthritis synovial macrophages (RA SM) untreated, (b) on macrophages differentiated from THP-1 untreated, (c) on SM pre-treated with lipopolysaccharide and (d) on EBV+ B lymphocytes (positive control cell line).
