HCG beta Protein (Active)

Purified human HCG beta protein.

Product Specifications

Background

Human chorionic gonadotropin (CG) is a glycoprotein hormone produced by trophoblastic cells of the placenta beginning 10 to 12 days after conception. It is a glycoprotein composed of 237 amino acids with a molecular mass of 25.7 kDa. It is heterodimeric, with an α (alpha) subunit identical to that of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid-stimulating hormone (TSH), and β (beta) subunit that is unique to hCG. β subunit is secreted by some cancers including seminoma, choriocarcinoma, germ cell tumors, hydatidiform mole formation, teratoma with elements of choriocarcinoma, and islet cell tumor. Combined with alpha-fetoprotein, β-HCG is an excellent tumor marker for the monitoring of germ cell tumors.

Synonyms

Chorionic gonadotropin beta subunit, hCG-b, β-HCG

Source

Human pregnancy urine

Applications

ELISA

Purity

≧90% by SDS-PAGE

Buffer

Each vial contains 0.01 M PBS, 0.15 M NaCl (pH 7.4) with 0.05% NaN3.

References & Citations

Lapthorn AJ, Harris DC, Littlejohn A, Lustbader JW, Canfield RE, Machin KJ, Morgan FJ, Isaacs NW (June 1994) . "Crystal structure of human chorionic gonadotropin". Nature 369 (6480) : 455–61.

Storage Conditions

Shipat 4°C. Upon receipt, aliquot and store at -20°C or -80°C for long term. Avoid repeated freeze and thaw cycles.

Formulation

Liquid