RBP4 Protein, Human

RBP4 protein acts as a retinol-binding protein, essential for transporting retinol in blood plasma. It facilitates the delivery of retinol from the liver to peripheral tissues and likely transfers bound all-trans retinol to STRA6 for cell membrane transport. Interactions with TTR prevent kidney glomeruli filtration loss. Direct interaction with STRA6 underscores RBP4's role in intricate retinol transport and distribution processes in the body. RBP4 Protein, Human is the recombinant human-derived RBP4 protein, expressed by E. coli , with tag free.

The RBP4 protein serves as a retinol-binding protein, playing a crucial role in mediating the transport of retinol in blood plasma. It is implicated in delivering retinol from liver stores to peripheral tissues, and it likely transfers the bound all-trans retinol to STRA6, facilitating retinol transport across the cell membrane. RBP4 engages in interactions with TTR, a relationship that helps prevent its loss through filtration in the kidney glomeruli. Furthermore, the protein directly interacts with STRA6, reinforcing its involvement in the intricate processes of retinol transport and distribution in the body.

Measured by its binding ability in a functional ELISA. Immobilized RBP4 at 5 μg/mL can bind Human TTR (HY-P70500), the ED₅₀ for this effect is 695.8 ng/mL.

Human

E. coli

Tag Free

P02753 (E19-L201)

5950  [NCBI]

Full Length of Mature Protein

ERDCRVSSFRVKENFDKARFSGTWYAMAKKDPEGLFLQDNIVAEFSVDETGQMSATAKGRVRLLNNWDVCADMVGTFTDTEDPAKFKMKYWGVASFLQKGNDDHWIVDTDYDTYAVQYSCRLLNLDGTCADSYSFVFSRDPNGLPPEAQKIVRQRQEELCLARQYRLIVHNGYCDGRSERNLL

Approximately 20-22 kDa, based on SDS-PAGE under reducing conditions.

≥ 95%, as determined by reducing SDS-PAGE.

Lyophilized powder.

1.Lyophilized from a 0.22 μm filtered solution of 50 mM Tris-HCl, 10 mM CaCl₂, 150 mM NaCl, pH 7.5.
2.Lyophilized from a 0.22 μm filtered solution of 50 mM Tris-HCl, 10 mM CaCl₂, 150 mM NaCl, pH 7.5, 8% trehalose.
Please refer to the lot-specific COA for specific buffer information.
Note: For SPR assay, please replace the buffer. Primary amine components (e.g., Tris, imidazole) can affect protein-coupled chips.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.