Flow cytometric analysis of Mouse FR4 expression on BALB/c mouse splenocytes. BALB/c mouse splenocytes were stained with Brilliant Violet 421™ Rat Anti-Mouse CD4 Antibody and either Alexa Fluor® 647 Rat IgG1, κ Isotype Control (Left panel) or Alexa Fluor® 647 Rat Anti-Mouse FR4 Antibody (Right panel) at 1.25 μl/test. Flow cytometry and data analysis were performed using BD FACSymphony™ A1 and FlowJo™ software.
Product Details
Product Details
Product Specification
Host | Rat |
Antigen | FR4 |
Synonyms | Sperm-egg fusion protein Juno; Folate receptor 4; Folate receptor delta (FR-delta); Folate-binding protein 3; IZUMO1 receptor protein JUNO; Folbp3; Folr4; Juno; Izumo1r |
Location | Cell membrane |
Accession | Q9EQF4 |
Clone Number | S-R705 |
Antibody Type | Rat mAb |
Isotype | IgG1,k |
Application | FCM |
Reactivity | Ms |
Positive Sample | BALB/c mouse splenocytes |
Purification | Protein G |
Concentration | 0.2 mg/ml |
Conjugation | Alexa Fluor® 647 |
Physical Appearance | Liquid |
Storage Buffer | PBS, 1% BSA, 0.3% Proclin 300 |
Stability & Storage | 12 months from date of receipt / reconstitution, 2 to 8 °C as supplied |
Dilution
application | dilution | species |
FCM | 1.25μl per million cells in 100μl volume | Ms |
Background
Folate receptor 4 (FR4), also known as folate receptor delta or IZUMO1R, is a protein encoded by the FOLR4 gene in humans. It is a subtype of the receptor for the vitamin folic acid and is primarily expressed on CD4 T lymphocytes, with lower expression on CD8 T cells. FR4 is highly expressed in regulatory T cells (Tregs) and is also found in tumor-associated macrophages (TAMs) and T follicular helper cells (TFH cells). This protein plays a role in immune regulation, as its high expression can distinguish Tregs from other T cells. Additionally, FR4 is involved in the high-affinity binding and transport of folate and folate analogs across the cell membrane.
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