|Flow Cytometry (Flow)||1 µg/test|
|Immunohistochemistry (Frozen) (IHC (F))||Assay-Dependent|
|Flow Cytometry (Flow)||See 3 publications below|
|Immunofluorescence (IF)||See 2 publications below|
|Immunohistochemistry (Frozen) (IHC (F))||See 1 publications below|
|Immunohistochemistry (Paraffin) (IHC (P))||See 2 publications below|
|Tested Species reactivity||Bovine, Dog, Cat, Mouse, Pig, Rat|
|Published species reactivity||Not Applicable|
|Host / Isotype||Rat / IgG2a, kappa|
|Storage buffer||PBS, pH 7.2, with 0.1% gelatin|
|Contains||0.09% sodium azide|
|Storage conditions||4° C, store in dark, DO NOT FREEZE!|
Description: The FJK-16s antibody reacts with mouse, rat, dog, porcine, bovine and cat Foxp3 also known as FORKHEAD BOX P3, SCURFIN, and JM2; cross reactivity of this antibody to other proteins has not been determined. Foxp3, a 49-55 kDa protein, is a member of the forkhead/winged-helix family of transcriptional regulators, and was identified as the gene defective in 'scurfy' (sf) mice. Constitutive high expression of foxP3 mRNA has been shown in CD4+CD25+ regulatory T cells (Treg cells), and ectopic expression of foxp3 in CD4+CD25- cells imparts a Treg phenotype in these cells.
Immunoblotting with FJK-16s antibody has mapped the epitope to amino acids 75-125 of the mouse Foxp3 protein. In the human, this region has been shown to be alternatively spliced at the mRNA level. Both the alternatively-spliced and non-spliced isoforms are present in the CD4+CD25+ subset of lymphocytes. Preliminary RT-PCR experiments have not revealed this alternatively-spliced isoform in mouse splenocytes, suggesting different gene regulation in the mouse and human.
Please note that FJK-16s has been optimized for use with the Foxp3/Transcription Factor Buffer Staining Set (cat. 00-5523). The use of other fixation and staining buffers is not recommended.
Applications Reported: This FJK-16s antibody has been reported for use in intracellular flow cytometric analysis. For optimal staining with FJK-16s, it is highly recommended to use the Anti-Mouse/Rat Foxp3 FITC Staining Set (cat. 71-5775). FJK-16s has also been reported for use in immunohistochemical staining of frozen tissue sections.
Applications Tested: This FJK-16s antibody has been tested by intracellular flow cytometric analysis of mouse splenocytes using the Anti-Mouse Foxp3 FITC Staining Set (cat. 71-5775) and protocol. Please refer to intracellular Staining Protocol on Best Protocol web page - Protocol B: One-step protocol for intracellular (nuclear) proteins. This antibody can be used at less than or equal to 1 µg per test. A test is defined as the amount (µg) of antibody that will stain a cell sample in a final volume of 100 µL. Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest.
Excitation: 488 nm; Emission: 520 nm; Laser: Blue Laser
FOXP3 is a member of the forkhead/winged-helix family of transcriptional regulators and is highly conserved across mammals. FOXP3 is essential for normal immune homeostasis. FOXP3 is stably and constitutively expressed at a high level in CD25 + CD4 positive regulatory T cells, a low level in CD4-positive/CD25-negative cells, and is absent in CD4-negative/CD8-positive T cells. FOXP3 may be a master regulatory gene and a more specific marker of regulatory T cells than other T cells.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: Forkhead box protein P3; Scurfin; scurfy
Gene Aliases: Foxp3; JM2; RGD1562112; scurfin; sf
UniProt ID: (Mouse) Q99JB6
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