那非類檢測(cè)試劑盒

廣州健侖生物科技有限公司

廣州健侖長期供應(yīng)：動(dòng)物、畜牧、食品、藥品、化妝品、水產(chǎn)品、違禁品的快速檢測(cè)試劑盒。

動(dòng)物類的主要檢測(cè)項(xiàng)目包括：豬、狗、貓、牛、雞、鴨和鵝的傳染病。

畜牧類的主要檢測(cè)項(xiàng)目包括：多種添加劑、瘦肉精添加劑等。

食品類的主要檢測(cè)項(xiàng)目包括：添加劑殘留、農(nóng)藥殘留、藥物殘留等。

化妝品的主要檢測(cè)項(xiàng)目包括：重金屬、有害物質(zhì)等。

水產(chǎn)品的主要檢測(cè)項(xiàng)目包括：呋喃類藥物殘留、抗生素殘留等。

違禁品的主要檢測(cè)項(xiàng)目包括：MOP/MET/KET/THC/MDMA/COC/BZO/AMP/K2/BAR/TCA/BUP/MTD/PCP/OXY/EDDP

我司還提供其它進(jìn)口或國產(chǎn)試劑盒：包括傳染病系列、免疫組化系列、診斷血清等產(chǎn)品。

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那非類檢測(cè)試劑盒

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【公司名稱】 廣州健侖生物科技有限公司

【市 場(chǎng) 部】    楊永漢

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【騰訊Q Q】 2042552662

【公司地址】 廣州清華科技園創(chuàng)新基地番禺石樓鎮(zhèn)創(chuàng)啟路63號(hào)二期2幢101-103室

reducing agent:
Due to the presence of inter-protein disulfide bonds, reducing agents are generally used at the time of solubilization. Reducing agents are generally used in concentrations of 50-100 mM 2-BME or DTT, as are 5 mM concentrations. Under more extensive conditions, a concentration of 5 ml / l can be used. The concentration of reducing agent has nothing to do with the number of protein disulfide bonds, while some of the proteins without disulfide bond have no effect on reducing agents such as the solubilization of bovine growth hormone inclusion bodies. For the solubilization of certain inclusion bodies without the disulfide bond of the target protein, the use of reducing agents is sometimes necessary, possibly due to the inclusion body disulfide-solubilizing inclusions.
Refolding:
By slowly removing the denaturant, the target protein is restored from its denatured fully extended state to the normal folded structure, while the reducing agent is removed to allow the disulfide bond to form normally. Generally, the refolding process begins when the urea concentration is about 4M, and ends at about 2M. For guanidine hydrochloride, we can start from 4M, to 1.5M renaturation process has ended.
Methods often used in renaturation are:
Dilution refolding: directly add water or buffer, placed overnight, the disadvantage is a larger volume increase, denaturant dilution rate too fast, not easy to control.
Dialysis refolding: the advantage is not to increase the volume, by gradually reducing the concentration of liquid to control the rate of denaturant removal, it was easy to form a precipitate, and is not suitable for large-scale operation, can not be applied to the scale of production.
Ultrafiltration renaturation: more use in production, larger, easy to control the speed of dialysis, the disadvantage is not suitable for the case of small sample size, and some proteins may be irreversible denaturation in the ultrafiltration process.
Refolding: This is a more recent and successful method of refolding used in production. For example, North China Pharmaceutical's refolding of G-CSF is said to be performed by refolding on a column. Commonly used in the renaturation of the chromatographic methods SEC, HIC and so on.