|Recombinant Human RBP4 protein (Catalog#10354-H08H)|
|0.2 μm filtered solution in PBS|
|Produced in rabbits immunized with purified, recombinant Human RBP4 / PRBP (rh RBP4; Catalog#10354-H08H; Met 1-Leu 201; NP_006735.2). RBP4 specific IgG was purified by human RBP4 affinity chromatography.|
WB: 2-5 μg/ml
ELISA: 0.5-1.0 μg/mL
This antibody can be used at 0.5-1.0 μg/mL with the appropriate secondary reagents to detect Human RBP4. The detection limit for Human RBP4 is 0.00245 ng/well.
IHC-P: 1-3 μg/mL
IP: 1-4 μg/mg of lysate
Retinol-binding protein 4 (RBP4) is the specific carrier for retinol (also known as vitamin A), and is responsible for the conversion of unstable and insoluble retinol in aqueous solution into stable and soluble complex in plasma through their tight interaction. As a member of the lipocalin superfamily, RBP4 containing a β-barrel structure with a well-defined cavity is secreted from the liver, and in turn delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP4-retinol complex interacts with transthyretin (TTR), and this binding is crucial for preventing RBP4 excretion through the kidney glomeruli. RBP4 expressed from an ectopic source efficiently delivers retinol to the eyes, and its deficiency affects night vision largely. Recently, RBP4 as an adipokine, is found to be expressed in adipose tissue and correlated with obesity, insulin resistance (IR) and type 2 diabetes (T2DM).