產(chǎn)品名稱：hCG-b, free ELISA 產(chǎn) 地：Demeditec 產(chǎn)品貨號：DE4718 產(chǎn)品規(guī)格：96 Tests 產(chǎn)品說明： 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. 上海玉博生物技術有限公司在為生命科學領域提供豐富的產(chǎn)品與信息資源方面處于****地位，公司提供的產(chǎn)品涵蓋了二十多個國家近五十萬種產(chǎn)品，而且產(chǎn)品的數(shù)量與信息在不斷的增長和更新，公司提供的產(chǎn)品能夠使生命科學工作者加快對生物化學，分子生物學，細胞生物學以及蛋白質(zhì)組學研究的認知，以及分子診斷和臨床醫(yī)學領域的應用。
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