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Merck
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Key Documents

F0504

Sigma-Aldrich

Folate binding protein from bovine milk

lyophilized powder

Sinónimos:

Folate Protein

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About This Item

MDL number:
MFCD00131098
UNSPSC Code:
12352202
NACRES:
NA.61

biological source

bovine milk

form

lyophilized powder

usage

1 mg sufficient for ~4,000 assays

composition

Protein, 20-40% modified Warburg-Christian

technique(s)

ligand binding assay: suitable
surface plasmon resonance (SPR): suitable

capacity

1.5-6.0 μg/mg, protein binding capacity (folic acid)(25 °C at pH 7.5.)

storage temp.

−20°C

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Application

Folate binding protein can be used in radioligand binding assays of serum folate. The folate receptor has been used in studies as a therapeutic target in a variety of cancers.
Folate binding protein from bovine milk has been used in folate binding studies using surface plasmon resonance and in the uptake studies in kidney proximal tubule cells.
Useful for radioligand binding assays of serum folate. May also bind N-methyltetrahydrofolic acid and other folate analogues.

Biochem/physiol Actions

Folate-binding protein (FBP) is present as a cell receptor and binds to folate in equimolar ratio. It is involved in the transport of folate and improves their bioavailability.

Packaging

Package size based on protein content

Quality

Purified over 1,000 fold. May contain a trace of β-mercaptoethanol.

Physical form

Lyophilized powder containing buffer salt as sodium citrate

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Certificados de análisis (COA)

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Dietary interactions influence the effects of bovine folate-binding protein on the bioavailability of tetrahydrofolates in rats
Jones ML, et al.
The Journal of Nutrition, 133(2), 489-495 (2003)
Radioisotopic assay for measurement of serum folate levels.
S Waxman et al.
Blood, 38(2), 219-228 (1971-08-01)
Martin D Forster et al.
Cytometry. Part A : the journal of the International Society for Analytical Cytology, 71(11), 945-950 (2007-08-23)
The alpha-folate receptor (alpha-FR) is a folate transporter with restricted expression levels in normal tissues. It is over-expressed in several cancers, particularly epithelial carcinomas, including nonmucinous ovarian carcinoma. It offers a novel therapeutic target for selective imaging and cytotoxic agents.
Radioassay of serum folate.
R T Dunn et al.
Clinical chemistry, 19(10), 1101-1105 (1973-10-01)
J F Ross et al.
Cancer, 73(9), 2432-2443 (1994-05-01)
Despite significant differences in ligand binding between the two known isoforms of the human membrane folate receptor (FR), designated herein as FR-beta (placenta) and FR-alpha (placenta, KB cells), little is known about their tissue specificities, and there is no report
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