Gene Name Synonym

LF, TRFL, LTF, GIG12

Species

Human

Accession

P02788

Source

HEK293 cells

SPECIFICATIONS

Amino acid sequence

Gly20-Lys710 is expressed with a 10×His tag at the C terminus

Molecular Weight

79.3 kDa

Purity

>95.0% as determined by SDS-PAGE

Endotoxin

<5 EU mg^-1

Formulation

Lyophilized from sterile PBS, pH 7.4. Normally 5%-8% trehalose and mannitol are added as protectants before lyophilization.

Reconstitution

Dissolved in sterile water, it is recommended to add 0.1% HSA or BSA for long-term preservation.

STORAGE

Stability and Storage

12 months from date of receipt at -20°C to -70°C. After reconstitution, it is stable at 4°C for 1 week or -20°C for almost 6 months (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

BACKGROUND

Lactoferrin (LF) is a multifunctional protein occurring in many biological secretions including milk. It possesses iron binding/transferring, antibacterial, antiviral, antifungal, anti-inflammatory
and anti-carcinogenic properties. LF is primarily extracted from bovine milk and it is subsequently added into many commercial products such as nutritional supplements, infant formula, cosmetics and toothpaste. Lactoferrin interacts with DNA and RNA, polysaccharides and heparin, and shows some of its biological functions in complexes with these ligands. Although the mechanism underlying the action of Lf in bone cells is still not fully elucidated, it has been shown that its mode of action leading to the survival of osteoblasts is complemented by its mitogenic effect. LF is sensitive to denaturation induced by temperature and other physicochemical stresses. The bioavailability of LF in vivo is poor.

Data

SDS-PAGE

Bioactivity

Recombinant Human LF Protein was determined by SDS-PAGE with Coomassie Blue.

Measured by its ability to induce TNF-α secretion by THP-1 cells. The ED50 for this effect is 31 μg/mL.