北京啟維益成科技有限公司（Beijing QiWei YiCheng Tech Co.,Ltd.） 
北京啟維益成科技有限公司成立于2005年12月，由從事生物領(lǐng)域多年銷售經(jīng)驗人士創(chuàng)立。目前我公司已經(jīng)與幾十家著名的試劑供應(yīng)商建立了長期穩(wěn)定的合作關(guān)系，已成為眾多國際知名品牌的中國總代理或一級代理商；并且為滿足國內(nèi)客戶的較早需求，我們也與時俱進地不斷與世界上更多的知名品牌洽談合作代理事宜；企業(yè)的主要目標(biāo)是把國外有特點的生物前沿產(chǎn)品引進中國，讓國內(nèi)科學(xué)研究機構(gòu)和制藥企業(yè)盡早使用上較早型的科研產(chǎn)品。 

我們代理的產(chǎn)品覆蓋細胞生物學(xué)、植物學(xué)、分子生物學(xué)、免疫學(xué)、生物化學(xué)、蛋白組學(xué)。生物制藥與診斷試劑研發(fā)生產(chǎn)等領(lǐng)域。 
--細胞生物學(xué)包含細胞培養(yǎng)，細胞遷移，細胞信號轉(zhuǎn)導(dǎo)等。 
--植物學(xué)包含植物抗體，植物抗生素，植物組織培養(yǎng)試劑等。 
--分子生物學(xué)包含表觀遺傳試劑盒，核酸提取，轉(zhuǎn)染試劑等。 
--免疫學(xué)包含抗體，各類檢測試劑盒等。 
--生物化學(xué)包含各類生化試劑，化學(xué)小分子，常規(guī)試劑等。 
--蛋白組學(xué)包含不同種屬的重組蛋白，天然提取蛋白，細胞因子等。 
--生物制藥與診斷試劑研發(fā)方面的試劑包含各類蛋白抑制劑，酶類等。

改良MS基鹽（不含NH4NO3）
MS medium is the most used tissue culture medium, of which many variations have been developed. The medium is originated from White s medium and originally developed for the cultivation of Nicotiana tabacum calli. Compared to White medium, the concentration of all ingredients is increased. An increase to 50-60 mM nitrogen stimulated the growth of Nicotiana cells significantly, however a concentration of 80 mM and higher was clearly disadvantageous to the cells. The increase of all other elements, especially the macro -elements, also stimulated the growth of the calli. Due to the high concentration of minerals, MS medium is a very rich and -saline -medium and may be too salty to certain plant species. To avoid this problem, MS is often used with the micro elements in full concentration, but with the macro elements in respectively half or three-quarter of the concentration as originally described by the authors. Sometimes the original MS vitamines are replaced by the vitamins of Linsmaier and Gamborg B5 medium regarding the higher concentration of Thiamine in relation to the requirement of this vitamin by plants.
成份表：
 

Murashige T. and Skoog F., Physiol. Plant, 15, 473 (1962).

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