Recombinant Human GPIHBP1 Fc Chimera Protein, CF

Recombinant Human GPIHBP1 Fc Chimera Protein, CF Summary

Product Specifications

Product Datasheets

Carrier Free

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Background: GPIHBP1

GPIHBP1 (Glycosylphosphatidylinositol-anchored high density lipoprotein-binding protein 1) is a member of the Ly6 family of proteins (1, 2). Human GPIHBP1 is synthesized as a 184 amino acid (aa) protein that includes a 20 aa signal peptide, a 131 aa GPIHBP1 chain containing the Ly6 domain, and a 33 aa propeptide. Within the main chain region, human GPIHBP1 shares 54% and 53% aa sequence identity with mouse and rat GPIHBP1, respectively. It is found on capillaries of heart, skeletal muscle, and adipose tissue (3), but not expressed in endothelial cells of larger blood vessels or expressed in capillaries of the brain (3, 4).  GPIHBP1 binds both lipoprotein lipase (LPL) and chylomicrons (CM), and the acidic domain of GPIHBP1 is required for LPL binding (3, 5). Triglyceride-rich lipoproteins undergo lipolysis by LPL bound by GPIHBP1 and transported across the cells to the capillary lumen (6-7). GPIHBP1 is an important regulator of triglyceride metabolism by increasing the efficiency of lydrolysis by LPL and uptake of fatty acids (3, 8-9).