Can I stain for FoxP3 and BD Phosflow antibodies?
Yes, using Perm/Wash Buffer I and strategic gating of the CD4+CD25+bright population, we can see the FoxP3-positive population separated from CD4 or CD25. Generally, the detergent-based, Perm/Wash Buffer I will work better (in terms of signal to noise) for FoxP3 staining than the methanol-based Perm Buffer III.