C57BL/6 mouse splenocytes were stained with Rat IgG2b kappa Isotype Control, FITC (Product # 11-4031-82) (blue histogram) or CD4 Monoclonal Antibody, FITC (purple histogram). Cells in the lymphocyte gate were used for analysis.
Supplier Page from Thermo Fisher Scientific for CD4 Antibody FITC