Formulated & optimized for the staining of mouse splenocytes with the FJK-16s monoclonal antibody. eBioscience™ Mouse Regulatory T Cell Staining Kit #3 includes: Anti-Mouse CD4 FITC, CD25 PE & CD16/32, Anti-Mouse/Rat Foxp3 PE-Cy5, Rat IgG2a Isotype Control PE-Cy5, stain buffer, fixation concentrate.