Anti-Folate Binding Protein/FBP antibody [EPR20277]
- RabMAb
- Recombinant
- KO Validated
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(10 Publications)
Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) is a rabbit monoclonal antibody detecting Folate Binding Protein/FBP in Western Blot, IHC-P. Suitable for Human, Mouse, Rat.
- KO validated for confirmed specificity
- Biophysical QC for unrivalled batch-batch consistency
View Alternative Names
FOLR, FOLR1, Folate receptor alpha, FR-alpha, Adult folate-binding protein, Folate receptor 1, KB cells FBP, Ovarian tumor-associated antigen MOv18, FBP
- IHC-P
Supplier Data
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Immunohistochemical analysis of paraffin-embedded human lung cancer tissue labeling Folate Binding Protein/FBP with ab221543 at 1/1000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use). Cytoplasmic staining on tumor cells of human lung cancer (PMID : 22204844). Counter stained with Hematoxylin.
Secondary antibody only control : Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use).
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
- IHC-P
Lab
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Immunohistochemical analysis of formalin fixed paraffin embedded human cervical carcinoma labelling Folate Binding Protein with ab221543 at a concentration of 0.1µg/ml. The immunostaining was performed on a Ventana DISCOVERY ULTRA (Roche Tissue Diagnostics) instrument with a OptiView DAB IHC Detection Kit. Heat mediated antigen retrieval was performed with DISCOVERY cell conditioning solution (CC1) 100°C, pH8.5 for 32 mins. ab221543 Anti-Folate Binding Protein/FBP antibody [EPR20277] was incubated for 16 mins at 37°C. Sections were counterstained with Hematoxylin II. Image inset shows absence of staining in secondary antibody only control.
Customers are encouraged to optimise antigen retrieval conditions, antibody concentration, incubation times and temperature for best results in their own IHC assay workflow (automated and manual).
- IHC-P
Supplier Data
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Negative control :
Immunohistochemical analysis of paraffin-embedded human tonsil tissue labeling Folate Binding Protein/FBP with ab221543 at 1/1000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use). No staining on human tonsil (PMID : 22547449). Counter stained with Hematoxylin.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
- IHC-P
Supplier Data
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Immunohistochemical analysis of paraffin-embedded human kidney tissue labeling Folate Binding Protein/FBP with ab221543 at 1/1000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) (ab97051, ready to use). Cytoplasmic staining on human kidney (PMID : 22204844). Counter stained with Hematoxylin.
Secondary antibody only control : Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) (ab97051, ready to use).
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
- IHC-P
Supplier Data
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Immunohistochemical analysis of paraffin-embedded human ovarian cancer tissue labeling Folate Binding Protein/FBP with ab221543 at 1/1000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use). Mainly membranous staining on tumor cells of human ovarian cancer (PMID : 22204844). Counter stained with Hematoxylin.
Secondary antibody only control : Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use).
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
- IHC-P
Supplier Data
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Immunohistochemical analysis of paraffin-embedded rat kidney tissue labeling Folate Binding Protein/FBP with ab221543 at 1/1000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use). Positive staining on rat kidney (PMID : 22204844). Counter stained with Hematoxylin.
Secondary antibody only control : Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use).
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
- IHC-P
Supplier Data
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Immunohistochemical analysis of paraffin-embedded mouse kidney tissue labeling Folate Binding Protein/FBP with ab221543 at 1/1000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use). Positive staining on mouse kidney (PMID : 22204844). Counter stained with Hematoxylin.
Secondary antibody only control : Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) (ab97501, ready to use).
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
- WB
Lab
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Lanes 1-4 : Merged signal (red and green). Green - ab221543 observed at 36, 38 kDa. Red - loading control, ab7291 observed at 52 kDa.
ab221543 Anti-Folate Binding Protein/FBP antibody [EPR20277] was shown to specifically react with Folate Binding Protein/FBP in wild-type HeLa cells. Loss of signal was observed when knockout cell line ab264921 (knockout cell lysate ab257270) was used. Wild-type and Folate Binding Protein/FBP knockout samples were subjected to SDS-PAGE. ab221543 and Anti-alpha Tubulin antibody [DM1A] - Loading Control (ab7291) were incubated overnight at 4°C at 1 in 1000 dilution and 1 in 20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed (ab216776) secondary antibodies at 1 in 10000 dilution for 1 hour at room temperature before imaging.
The molecular weight (36,38kDa) observed were knockout validated and consistent with what has been described in the literature (PMID : 23144806).
All lanes:
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) at 1/1000 dilution
Lane 1:
Wild-type HeLa cell lysate at 20 µg
Lane 2:
Western blot - Human FOLR1 (Folate Binding Protein/FBP) knockout HeLa cell line (<a href='/en-us/products/cell-lines/human-folr1-folate-binding-protein-fbp-knockout-hela-cell-line-ab264921'>ab264921</a>)
Lane 2:
FOLR1 knockout HeLa cell lysate at 20 µg
Lane 3:
JAR cell lysate at 20 µg
Lane 4:
MDA-MB-231 cell lysate at 20 µg
Predicted band size: 30 kDa
Observed band size: 38 kDa,36 kDa
false
- WB
Lab
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Lanes 1-4 : Merged signal (red and green). Green - ab221543 observed at 36, 38 kDa. Red - loading control, ab7291 observed at 52 kDa.
ab221543 Anti-Folate Binding Protein/FBP antibody [EPR20277] was shown to specifically react with Folate Binding Protein/FBP in wild-type HeLa cells. Loss of signal was observed when knockout cell line ab264921 (knockout cell lysate ab257270) was used. Wild-type and Folate Binding Protein/FBP knockout samples were subjected to SDS-PAGE. ab221543 and Anti-alpha Tubulin antibody [DM1A] - Loading Control (ab7291) were incubated overnight at 4°C at 1 in 1000 dilution and 1 in 20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed (ab216776) secondary antibodies at 1 in 10000 dilution for 1 hour at room temperature before imaging.
The molecular weight (36,38kDa) observed were knockout validated and consistent with what has been described in the literature (PMID : 23144806).
All lanes:
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) at 1/1000 dilution
Lane 1:
Wild-type HeLa cell lysate at 20 µg
Lane 2:
FOLR1 knockout HeLa cell lysate at 20 µg
Lane 3:
JAR cell lysate at 20 µg
Lane 4:
MDA-MB-231 cell lysate at 20 µg
Predicted band size: 30 kDa
Observed band size: 38 kDa,36 kDa
false
- WB
Supplier Data
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Exposure times :
Lane 1 : 10 seconds
Lane 2 : 30 seconds
Lanes 3-4 : 5 seconds
Lane 5 : 3 minutes
The molecular weight (36,38kDa) observed were knockout validated and consistent with what has been described in the literature (PMID : 23144806).
All lanes:
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) at 1/1000 dilution
Lane 1:
JAR (human placenta choriocarcinoma epithelial cells) whole cell lysate at 20 µg
Lane 2:
Human fetal kidney lysate at 20 µg
Lane 3:
Mouse kidney lysate at 20 µg
Lane 4:
Rat kidney lysate
Lane 5:
HeLa (Human cervix adenocarcinoma epithelial cells) whole cell lysate at 10 µg
Secondary
All lanes:
Western blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution
Predicted band size: 30 kDa
Observed band size: 38 kDa,36 kDa
false
- WB
Supplier Data
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (AB221543)
Exposure time :
Lanes 1-2 : 5 seconds
The molecular weight (36,38kDa) observed were knockout validated and consistent with what has been described in the literature (PMID : 23144806).
All lanes:
Western blot - Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) at 1/5000 dilution
Lane 1:
GST-His-tagged human recombinant FOLR1 (aa 25-160), 20 ng
Lane 2:
His-tagged human recombinant FOLR2 (aa 24-154), 20 ng
Secondary
All lanes:
Western blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution
Predicted band size: 30 kDa
Observed band size: 38 kDa,36 kDa
false
Related conjugates and formulations (3)
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Anti-Folate Binding Protein/FBP antibody [EPR20277] - BSA and Azide free
-
565 Alexa Fluor® 555
Alexa Fluor® 555 Anti-Folate Binding Protein/FBP antibody [EPR20277]
-
665 Alexa Fluor® 647
Alexa Fluor® 647 Anti-Folate Binding Protein/FBP antibody [EPR20277]
Reactivity data
Product details
What is this antibody validated in?
Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) is a rabbit recombinant monoclonal antibody and is validated for use in Western Blot (WB), Immunohistochemistry (IHC-P) in Human, Mouse, Rat samples.
What is the molecular weight of Folate Binding Protein/FBP?
Anti-Folate Binding Protein/FBP [EPR20277] (ab221543) specifically detects a band for Folate Binding Protein/FBP (UniProt: P15328) at a molecular weight of 30kDa.
Trial sizes available!
Test your antibody or perform pre-screening before committing to a larger quantity. Sold in 10µl. Discover our selection of trial-size antibodies.
Specificity confirmed
The specificity of Anti-Folate Binding Protein/FBP antibody [EPR20277] (ab221543) has been confirmed by Western blot testing in FOLR1 Knockout HeLa cell line, ab264921.
Other related products
We have a range of other formats of antibody clone [EPR20277] also available for your convenience: ab221543, Carrier free - ab235140, Alexa Fluor® 555 - ab309247, Alexa Fluor® 647 - ab309500
Patented technology
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.
What are the advantages of a recombinant monoclonal antibody?
This product is a recombinant monoclonal antibody, which offers several advantages including:
- - High batch-to-batch consistency and reproducibility
- - Improved sensitivity and specificity
- - Long-term security of supply
- - Animal-free batch production
For more information, read more on recombinant antibodies.
Properties and storage information
Form
Purification technique
Storage buffer
Shipped at conditions
Appropriate short-term storage duration
Appropriate short-term storage conditions
Appropriate long-term storage conditions
Aliquoting information
Storage information
Supplementary information
This supplementary information is collated from multiple sources and compiled automatically.
Biological function summary
FBP plays a critical role in cellular growth and replication by ensuring sufficient folate supply. It belongs to a family of receptors not forming part of a larger protein complex. FBP's primary function is delivering folate an important B vitamin which acts as a one-carbon donor in DNA synthesis and repair. Optimal folate transport by FBP supports cellular functions particularly in rapidly dividing cells.
Pathways
FBP significantly contributes to the folate-mediated one-carbon metabolic pathway critical for nucleotide biosynthesis. This pathway interconnects with the homocysteine remethylation cycle. FBP associates with other enzymes such as dihydrofolate reductase (DHFR) and methylenetetrahydrofolate reductase (MTHFR) which also play key roles in these pathways. These interactions ensure efficient folate metabolism and maintenance of normal cellular functions.
Product protocols
- Visit the General protocols
- Visit the Troubleshooting
- Download enhancedValidationDataWebsite|en
Target data
Publications (10)
Recent publications for all applications. Explore the full list and refine your search
Journal of nanobiotechnology 23:562 PubMed40797208
2025
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Journal of nanobiotechnology 22:763 PubMed39696571
2024
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ACS nano 17:11345-11361 PubMed37272787
2023
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Fluids and barriers of the CNS 19:92 PubMed36419095
2022
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Gynecologic oncology reports 39:100926 PubMed35146104
2022
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EBioMedicine 75:103771 PubMed34954655
2021
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Drug metabolism and pharmacokinetics 40:100409 PubMed34293696
2021
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Frontiers in oncology 11:668798 PubMed34079760
2021
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Cell reports 30:525-540.e7 PubMed31940494
2020
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Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology 49:271-281 PubMed30138940
2018
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Product promise
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