Invitrogen™ FOXP3 Monoclonal Antibody (FJK-16s), eFluor™ 570, eBioscience™, Invitrogen™

Catalog No.	Quantity
50-112-3631	25 μg
50-112-3632	100 μg

Catalog No. 50-112-3631 Supplier Invitrogen™ Supplier No. 41577380

Description

Rat Monoclonal Antibody

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. Applications Reported: This FJK-16s antibody has been reported for use in immunohistochemical staining of frozen tissue sections and immunohistochemical staining of formalin-fixed paraffin embedded tissue sections. Applications Tested: This FJK-16s antibody has been tested by immunohistochemistry of frozen mouse spleen at less than or equal to 5 μg/mL.

FOXP3 (Forkhead box protein 3) is a member of the forkhead/winged-helix family of transcriptional regulators, highly conserved across mammals, and essential for normal immune homeostasis. FOXP3 is 381 amino acids long, 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. Defects in the gene encoding FOXP3 protein cause the scurfy phenotype in mice. In humans FOXP3 defects play a role in IPEX syndrome (immune dysfunction, polyendocrinopathy, enteropathy, X-linked syndrome), also known as X-linked autoimmunity-allergic dysregulation (XLAAD) syndrome. Transcript variants of FOXP3 encoding different isoforms have been identified. In human breast and colon cancer cells, expression of FOXP3 is regulated by p53 in response to the DNA damage.

Specifications

• Antigen: FOXP3
• Applications: Immunohistochemistry (Frozen), Immunohistochemistry (Paraffin), Immunocytochemistry
• Classification: Monoclonal
• Clone: FJK-16s
• Concentration: 0.2 mg/mL
• Conjugate: eFluor 570
• Formulation: PBS with 0.09% sodium azide; pH 7.2
• Gene: Foxp3
• Gene Accession No.: Q99JB6
• Gene Alias: AIID; DIETER; forkhead box P3; forkhead box protein P3; Forkhead box protein P3 41 kDa form; Forkhead box protein P3, C-terminally processed; forkhead/winged helix transcription factor 3; Foxp3; FOXP3delta7; immune dysregulation, polyendocrinopathy, enteropathy, X-linked; immunodeficiency, polyendocrinopathy, enteropathy, X-linked; IPEX; JM2; MGC141961; MGC141963; PIDX; regulatory protein Foxp3; RGD1562112; RP23-54C14.1; scurfin; scurfy; sf; XPID
• Gene Symbols: Foxp3
• Host Species: Rat
• Purification Method: Affinity chromatography
• Quantity: 25 μg
• Regulatory Status: RUO
• Primary or Secondary: Primary
• Gene ID (Entrez): 100037405, 20371, 317382, 444998, 491876, 506053
• Target Species: Bovine, Canine, Feline, Mouse, Pig, Rat
• Content And Storage: 4°C, store in dark, DO NOT FREEZE!
• Product Type: Antibody
• Form: Liquid
• Isotype: IgG2a κ

Frequently Asked Questions (FAQs)

I am unable to analyze my cells stained with eFluor Organic Dyes today. What options do I have?

Our options will depend on the samples you are analyzing.

If cell viability is not critical, you can store your stained samples at 4 degrees C or on ice overnight in the dark and analyze the following day.

For samples stained with eFluor organic fluorochromes, we recommend that cells be suspended in 100 uL of Flow Cytometry Staining Buffer (Cat. No. 00-4222) and 100 uL of eBioscience IC Fixation Buffer (Cat. No. 00-8222); samples can be incubated for up to 3 days at 4 degrees C in the dark. Alternatively, the 1-step Fix/Lyse Solution (Cat. No. 00-5333) can be used. This is a great option when working with whole blood but also works for other cell types.

Can the eFluor Organic fluorochromes be used for intracellular staining?

Yes, the eFluor Organic fluorochromes can be used for intracellular staining. The eFluor organic fluorochromes maintain bright signal and require minimal changes in compensation when fixed with eBioscience IC Fixation Buffer (Cat. No. 00-8222-49) and Permeabilization Buffer (Cat. No. 00-8333-56) or 1-step Fix/Lyse Solution (Cat. No. 00-5333-54, 00-5333-57) (as compared to live cells).

What buffers are compatible with the eFluor Organic fluorochromes and eVolve QDots?

The eFluor Organic fluorochromes and eVolve QDots can be used with flow staining buffers containing PBS and protein.

What is the difference between eFluor Organic Dyes and eVolve Qdots?

The eFluor Organic Dyes (eFluor 450, APC-eFluor 780, PerCP-eFluor 710, eFluor 710) are conventional fluorochromes. In contrast, the eVolve line of products are Quantum dots.

Are the eFluor Organic Dyes photo-labile?

As with other fluorochromes, we recommend minimal exposure to light to maintain optimal signal.

Safety and Handling

WARNING: Reproductive Harm - www.P65Warnings.ca.gov

For Research Use Only.