Formulated and optimized for the staining of mouse splenocytes with the FJK-16s monoclonal antibody. eBioscience™ Mouse Regulatory T Cell Staining Kit #1 includes: Anti-Mouse CD4 FITC, CD25 APC and CD16/32, Anti-Mouse/Rat Foxp3 PE, Rat IgG2a Isotype Control PE, staining buffer, fixation concentrate.