• Product name

    Native Human hCG protein
    See all hCG proteins and peptides
  • Purity

    > 95 % SDS-PAGE.
    Purity: >98% as determined by SDS PAGE and HPLC. ab51782 is free of HbsAg, Hepatitis B surface antigen, and antibodies to HIV, Hepatitis C and HCV.
  • Expression system

  • Protein length

    Full length protein
  • Animal free

  • Nature

    • Species



Our Abpromise guarantee covers the use of ab51782 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Applications


  • Form

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

  • Reconstitution
    Reconstitiue in water to a concentration of 0.1-1.0 mg/ml

General Info

  • Alternative names

    • anterior pituitary glycoprotein hormones common subunit alpha
    • CG alpha
    • CG-ALPHA
    • CGB
    • CGB3
    • CGB5
    • CGB7
    • choriogonadotropin alpha chain
    • Chorionic gonadotrophin chain beta
    • chorionic gonadotrophin subunit alpha
    • chorionic gonadotropin beta 3 subunit
    • Chorionic gonadotropin beta chain
    • Chorionic gonadotropin beta subunit
    • chorionic gonadotropin, alpha polypeptide
    • chorionic gonadotropin, beta polypeptide
    • chorionic gonadotropin, beta polypeptide 3
    • Follicle stimulating hormone alpha chain
    • follicle-stimulating hormone alpha chain
    • follicle-stimulating hormone alpha subunit
    • follitropin alpha chain
    • FSH Alpha
    • FSH-alpha
    • FSHA
    • glycoprotein hormones alpha chain
    • glycoprotein hormones, alpha polypeptide
    • GPHa
    • GPHA1
    • HCG
    • hCGB
    • Human Chorionic Gonadotropin
    • LHA
    • LSH alpha
    • LSH-alpha
    • luteinizing hormone alpha chain
    • lutropin alpha chain
    • Thyroid stimulating hormone alpha chain
    • thyroid-stimulating hormone alpha chain
    • thyrotropin alpha chain
    • TSH Alpha
    • TSH-alpha
    • TSHA
    see all
  • Relevance

    Human chorionic gonadotropin (hCG) is a glycoprotein hormone produced by trophoblastic cells of the placenta beginning 10 to 12 days after conception. Maintenance of the fetus in the first trimester of pregnancy requires the production of hCG, which binds to the corpus luteum of the ovary which is stimulated to produce progesterone which in turn maintains the secretory endometrium. hCG is present only in trace amounts in non pregnant urine and sera. It rises sharply during pregnancy. HCG is composed of two non identical, non covalently linked polypeptide chains designated as the a and b subunits. The a subunit of HCG is nearly identical to that of thyroid stimulating hormone (TSH), follicle stimulating hormone (FSH) and luteinizing hormone (LH). A germ cell tumor which is positive for cytokeratin, placental alkaline phosphatase (PLAP) and HCG but negative for EMA and AFP is probably a choriocarcinoma.
  • Cellular localization



ab51782 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

1-4 of 4 Abreviews or Q&A


Thank you for your reply. I will be happy to help you further. You can call our main number (888)-77-ABCAM (22226) and ask for me. If for some reason I am unavailable, any of my colleagues will be happy to help you further. Our US Scientific Support line is open from 6am - 8pm EST Mon - Fri.

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Thank you for contacting us.

All three of these proteins (ab51782, ab77874, and ab126652) are full length native human hCG with a molecular weight of 36.7 kDa, consisting of the alpha and beta chains (UniProt: P01215 and P01233). The proteins ab77874 and ab126652 are known to be active, while ab51782 has not been tested for activity. Ab51782 and ab77874 are >95% pure, while ab126652 is >50% pure. I hope this helps, please let me know if you have any additional questions.

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The purity notes for the hCG protein ab51782 are as follows: Purity: >98% as determined by SDS PAGE and HPLC. ab51782 is free of HbsAg, Hepatitis B surface antigen, and antibodies to HIV, Hepatitis C and HCV.

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Thank you for contacting us. Indeed, I can confirm that the hCG protein ab51782 is produced from a sterile preparation of placental glucoprotein urine of post-menopausal women and has a total molecular mass of 36,700 Dalton. It consists of 237 amino acids, i.e. both the 92 amino acids alpha-chain and 145 amino acids beta-chain. The hCG is purified by proprietary chromatographic techniques. ab51782 is biologically active compared to standard. The biological activity of hCG is determined by using the seminal vesicle weight gain test in male rats described in the "Chorionic Gonadotrophins" monograph of the European Pharmacopoeia. The in vivo biological activity of hCG has been calibrated against the third international reference preparation IS75/587 for chorionic gonadotropin. The specific activity was found to be 5000 IU/mg. I hope this information is helpful to you and your customer. Please do not hesitate to contact us if you need any more advice or information.

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