Recombinant Human SHBG Protein, CF Summary
Leu30-His402, with a C-terminal 6-His tag
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.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS.|
|Reconstitution||Reconstitute at 250 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
R&D Systems proteins are almost always sold with a bioassay to indicate activity. However, we recognize that sometimes proteins might be novel, and their bioactivity may not be well understood. In addition, some researchers may wish to use polypeptides to make antibodies. To facilitate the advancement of new science, we now offer our Innovator Series of proteins.
Human SHBG (Sex hormone-binding globulin), also known as ABP (Testis-specific Androgen-binding protein) or TeBG (Testosterone-estradiol-binding globulin), is a variably glycosylated, secreted non-disulfide linked homodimer that belongs to the SHBG family (1). Members of this small family have tandem repeats of 170 amino acid (aa) long laminin alpha chain G‑ like domains. Each SHBG monomer is a 47-53 kDa, 373 aa glycoprotein that contains one steroid-binding site in its N-terminal G‑ like domain (2). SHBG is synthesized by the liver and circulates in blood. It binds to certain androgens and estrogens and serves as a transporter for the bound steroids (3); it is also involved in receptor mediated processes (4). Human SHBG shares approximately 67% aa sequence identity with mouse and rat SHBG. Low SHGB levels are associated with increased risk for type 2 diabetes for both man and women (5).
- Awakumov G.V. et al. (2010) Mol. Cell Endocrinol. 5:316.
- Grishkovskaya I. et al. (2000) EMBO J. 19:504.
- Anderson D.C. (1974) Clin. Endocrinol. (Oxf.) 3:69.
- Rosner W. et al. (2010) Mol. Cell Endocrinol.5:795.
- Muka T. et al. (2017) Diabetes. 66:577.
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