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Description
Alexa Fluor® 647 Rat Anti-Mouse FR4 Antibody (S-R705)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; Izumo1r; Folbp3; Folr4; Juno Location Cell membrane Accession Q9EQF4 Clone Number S R705 Antibody Type Rat mAb Isotype IgG1,k Application FCM Reactivity Ms Purification Protein G Conjugation Alexa Fluor 647 Physical Appearance Liquid Storage Buffer PBS, 25%
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; Izumo1r; Folbp3; Folr4; Juno |
| Location | Cell membrane |
| Accession | Q9EQF4 |
| Clone Number | S-R705 |
| Antibody Type | Rat mAb |
| Isotype | IgG1,k |
| Application | FCM |
| Reactivity | Ms |
| Purification | Protein G |
| Conjugation | Alexa Fluor® 647 |
| Physical Appearance | Liquid |
| Storage Buffer | PBS, 25% Glycerol, 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 | 5 μl per million cells in 100μl volume |
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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