重组人视黄醇结合蛋白4 His(Human RBP4 His)

RBP4 Human, His
Retinol Binding Protein-4 Human Recombinant, His tag
Catalog No. CYT-555

Synonyms:
Retinol Binding Protein 4 plasma, RBP-4, RBP4, Plasma retinol-binding protein, PRBP, RBP.

Introduction:
Retinol binding protein 4(RBP4) belongs to the lipocalin family and is the specific carrier for retinol (vitamin A alcohol) in the blood. This protein was found to be expressed and secreted by adipose tissue, and was strongly associated with insulin resistance. It delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin which prevents its loss by filtration through the kidney glomeruli.
RBP4 delivers retinol from the liver to the peripheral tissues. In plasma, the rbp-retinol complex interacts with transthyretin, this prevents its loss by filtration through the kidney glomeruli.

Description:
RBP-4 Human Recombinant produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 204 amino acids and having a molecular mass of 23 kDa.
RBP4 is fused to N-terminus His tag which containes additional 21 amino acids. RBP4 sequence is identical to UniProtKB/Swiss-Prot entry Q5VY30 amino acids 16–199.
The Retinol Binding Protein-4 is purified by proprietary chromatographic techniques.

Source:
Escherichia Coli.

Physical Appearance:
White lyophilized (freeze-dried) powder.

Formulation:
RBP-4 His tag was filtered (0.4 μm) and lyophilized from 0.5 mg/ml in PBS buffer, pH 7.5.

Solubility:
It is recommended to reconstitute the lyophilized Retinol binding protein-4 in sterile deionized water to a working volume of 0.5mg/mL and let the lyophilized pellet dissolve completely. Product is not sterile! Please filter the product by an appropriate sterile filter before using it in the cell culture.

Stability:
Lyophilized Retinol binding protein-4 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution Retinol binding protein-4 should be stored at 4°C between 2-7 days and for future use below -18°C.
For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please prevent freeze-thaw cycles.

Purity:
Greater than 95.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.

Biological Activity:
Determined by its ability to bind all trans retinol acids. The binding of RBP4 to all trans retinol acids results in quenching of Trp fluroscence. 0.5M retinol acids/per M RBP4.

Amino acid sequence:
MSWWHHHHHH NWNIPTTQDT TERDCRVSSF RVKENFDKAR FSGTWYAMAK KDPEGLFLQD NIVAEFSVDE TGQMSATAKG RVRLLNNWDV CADMVGTFTD TEDPAKFKMK YWGVASFLQK GNDDHWIVDT DYDTYAVQYS CRLLNLDGTC ADSYSFVFSR DPNGLPPEAQ KIVRQRQEEL CLARQYRLIV HNGYCDGRSERNLL.

Usage:
ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.

Related Products

» RBP4 Human