hCG-b, free ELISA

产品名称：hCG-b, free ELISA
产    地：Demeditec 
产品货号：DE4718
产品规格：96 Tests
产品说明：
Special remarks: Relation between ng and international units (IU).
1 ng of free β-hCG equals to 0.1 m IU in terms of hCG immunological activity.
This testkit replaces the former one coded DE1793.
Human Chorionic Gonadotropin (hCG) is a glycoprotein hormone normally produced by placenta during pregnancy. The hormone is present in blood and urine around seven to thirteen days following implantation of the fertilized ovum. Structurally intact hCG molecules consist of two non-covalently linked polypeptide subunits, the alpha and beta chain subunits. Measurement of intact hCG and of the alpha subunit of hCG appears to give similar results in blood and urine but not the levels of beta subunit.
In normal second-trimester maternal sera, the level of intact hCG ranges from 20,000 mlU/ml to 50,000 mlU/ml. In contrast, the levels of either free - or free ß-hCG are on average one half of 1% of hCG levels. hCG and the free subunits appear not to be useful as serological markers for nontrophoblastic tumors; however, the absolute increase of ß-hCG level in choriocarcinoma patients clearly differentiates it from normal pregnancy.
Recent studies showed a signifieant inerease in the level of free ß-hCG subunit in trisomy 21 cases as compared with controls. Hence it has been suggested that free ß-hCG subunit assay in a combination of maternal serum AFP could be effective in a screening protocol for trisomy 21.
上海玉博生物技术有限公司在为生命科学领域提供丰富的产品与信息资源方面处于国内**地位，公司提供的产品涵盖了二十多个国家近五十万种产品，而且产品的数量与信息在不断的增长和更新，公司提供的产品能够使生命科学工作者加快对生物化学，分子生物学，细胞生物学以及蛋白质组学研究的认知，以及分子诊断和临床医学领域的应用。

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