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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>浙江樣品前處理蛋白純化系統(tǒng),蛋白純化系統(tǒng)</p><p><span>***更新：</span>2020-08-04 21:46:02</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="kizlikb" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">蘇州英賽斯智能科技有限公司</a></p><p><span>聯(lián)系人：</span>李大為</p><p><span>郵箱: </span>570745634@qq.com</p><p><span>電話: </span>18606243033</p><p><span>傳真: </span>0512_63937379</p><p><span>網(wǎng)址: </span>http://www.inscinstech.com.cn</p><p><span>手機: </span>0512-63937378</p><p><span>地址: </span>吳江經(jīng)濟技術(shù)開發(fā)區(qū)聯(lián)楊路南側(cè)、龍橋路西側(cè)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="yso793h" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="fi70naw" class="box"><p><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二） 2.4.2 纖維素柱層析法該法是利用蛋白質(zhì)的酸堿性質(zhì)作為分離的基礎(chǔ)。離子交換纖維素（cellulose ion-exchanger）是人工合成的纖維素衍生物，它具有松散的親水性網(wǎng)狀結(jié)構(gòu)，有較大的表面積，使蛋白質(zhì)大分子可以自由通過。因此常用于蛋白質(zhì)的分離。（1）羧甲基纖維素（CM-纖維素）在纖維素顆粒上帶有羧甲基基團。在中性pH條件下，羧甲基上的質(zhì)子可解離下來（圖2-27a），而溶液中帶正電荷的蛋白質(zhì)分子可與纖維素顆粒上的羧甲基負(fù)電荷結(jié)合。可交換的基團帶正電，因此是一種陽離子交換劑。蛋白質(zhì)與離子交換纖維素之間結(jié)合能力的大小取決于彼此間相反電荷基團之間靜電吸引。 (2）二乙氨基乙基纖維素（DEAE-纖維素）在中性pH條件下，它含有帶正電荷的基團，可與溶液中的帶負(fù)電荷的蛋白質(zhì)結(jié)合，可交換的基團帶負(fù)電荷，因此是一種陰離子交換劑，浙江樣品前處理蛋白純化系統(tǒng)。當(dāng)某一蛋白質(zhì)混合溶液通過裝有DEAE-纖維素的層析柱時，帶正電荷的蛋白質(zhì)不能結(jié)合而隨著洗脫液的流動先被洗脫下來。帶負(fù)電荷的蛋白質(zhì)將被結(jié)合到柱上，浙江樣品前處理蛋白純化系統(tǒng)，浙江樣品前處理蛋白純化系統(tǒng)。結(jié)合力取決于彼此相反電荷基團間的靜電吸引。然后選用一定pH和離子強度的緩沖液進行洗脫，改變蛋白質(zhì)分子所帶的靜電荷，依次從層析柱流出達(dá)到相互分離的目的。浙江樣品前處理蛋白純化系統(tǒng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江樣品前處理蛋白純化系統(tǒng),蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171674741306/6371381716747413062985954.jpg"></div><p> 蛋白質(zhì)純化方法-親和層析親和層析法包括特異性配體親和層析法以及通用性配體親和層析法。比較這兩種親和層析法。特異性配體親和層析法通常將復(fù)雜的生命大分子物質(zhì)作為配體，它的結(jié)合力比較大河吸附選擇性比較強。而通用性配體親和層析法通常將簡單的小分子物質(zhì)作為配體，因此，它具有低廉的成本，吸附容量比較高，通過對吸附和脫附條件的改善能夠使得層析的分辨率提高。原理親和層析的原理類似于酶-底物，***-受體與抗原-抗體等特異性反應(yīng)的機理。有一定的親和力在每對反應(yīng)物之間。與在酶與底物的反應(yīng)中，只有特異的底物才可以結(jié)合一定的酶，使復(fù)合物產(chǎn)生相同。在親和層析中，只有特異的配體才可以和一定的生命大分子有親和力，并且使復(fù)合物產(chǎn)生。親和層析配體呈固相，而酶與底物的反應(yīng)底物呈液相是它們的不同點。事實上，親和層析是在含有活化基團的基質(zhì)M上以共價鍵的方式固化具有識別能力的配體L，將固相載體制作成功而固化后的配體束縛特異物質(zhì)的能力依然保持。所以當(dāng)在小層析柱裝入固相載體，使得欲分離的樣品在該柱經(jīng)過。此時，樣品中對配體有親和力的物質(zhì)S就能夠通過結(jié)構(gòu)互補效應(yīng)、范德瓦爾力與靜電引力等作用在固相載體上吸附著。山東直銷蛋白純化系統(tǒng)***的選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江樣品前處理蛋白純化系統(tǒng),蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171486404346/6371381714864043466859489.jpg"></div><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二） 2.4.3. 親和層析親和層析（affinity-chromatography）分離技術(shù)是根據(jù)許多蛋白質(zhì)對特定的化學(xué)基團具有專一性結(jié)合的原理。這些能被生物大分子如蛋白質(zhì)所識別并與之結(jié)合的基團稱為配基或配體（ligand）。親和層析是一種極有效的分離純化蛋白質(zhì)的方法。例如酶對它的底物具有特殊的親和力；抗原和抗體互為配基。以伴刀豆球蛋白A（concanavalin A）的分離純化為例，由于該蛋白對葡萄糖有專一性親和吸附，因此可把葡萄糖通過適當(dāng)?shù)幕瘜W(xué)反應(yīng)共價地連接到像瓊脂糖凝膠一類的載體表面上。為了防止載體表面的空間位阻影響待分離的蛋白質(zhì)大分子與其配基的結(jié)合，在配基和載體之間往往插入一段所謂的連接臂（或稱為間隔臂，spacerarm），使配體與載體之間保持足夠的距離。將這種多糖顆粒裝入一定規(guī)格的玻璃管中就制成了一根親和層析柱。當(dāng)含有伴刀豆球蛋白的提取液加到層析柱的上部，并沿柱從上往下過時，待純化的蛋白質(zhì)與其特異性配基結(jié)合而被吸附到柱上，其他蛋白因不能與葡萄糖配基結(jié)合將通過柱子而流出（圖2-28a）。然后采用一定的洗脫條件，如濃的葡萄糖溶液進行洗脫，即可把該蛋白質(zhì)洗脫下來，達(dá)到與其它蛋白質(zhì)分離的目的。</p><p style="text-indent:25px">實驗室及中試放大規(guī)模蛋白純化系統(tǒng) Unique Autopure系列蛋白純化系統(tǒng) 主要應(yīng)用領(lǐng)域： – 蛋白純化系統(tǒng)主要應(yīng)用于單抗、重組蛋白、疫苗、生化藥、、天然產(chǎn)物和多糖等生物制藥領(lǐng)域。用于生物制品的下游工藝的分離純化。 Unique AutoPure 系列蛋白純化系統(tǒng) ：產(chǎn)品特點及優(yōu)勢： – 模塊化設(shè)計，提供多個配置，滿足特殊工藝流程需求 - 低脈動高精度雙柱塞輸液泵，保證優(yōu)異的分離重現(xiàn)性 ; – 全系統(tǒng)與液體接觸的地方均由生物兼容性材料組成、符合FDA、USP VI等相關(guān)法規(guī)要求 ; – DAD全譜直讀檢測器，避免了傳統(tǒng)的機械切換式檢測器所帶來的不穩(wěn)定性及高故障率 ; – 固定波長檢測器燈為長壽命LED燈，壽命大于8000小時，降低維護成本 ; – **技術(shù)紫外檢測器流通池，低死體積、低峰拓展，提高了色譜分離度 ; – 高靈敏度在線pH、電導(dǎo)率、紫外檢測器，低死體積、低峰拓展，提高了色譜分離度 ; – 集中了buffer選擇閥，自動進樣閥、柱位閥等自動化組件，提高了純化的自動化程度 ; – 具有柱前、柱后、壓差報警，氣泡傳感器檢測等功能，極大的保護了系統(tǒng)及層析柱的安全性 ; – 層析工作站軟件是一款功能強大、性能先進、高穩(wěn)定性的色譜數(shù)據(jù)管理系</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江樣品前處理蛋白純化系統(tǒng),蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138172066720957/6371381720667209577791021.jpg"></div><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二）分離純化蛋白質(zhì)的一般程序 2.1 材料的預(yù)處理及細(xì)胞破碎分離提純某一種蛋白質(zhì)時，首先要把蛋白質(zhì)從組織或細(xì)胞中釋放出來并保持原來的天然狀態(tài)，不喪失活性。所以要采用適當(dāng)?shù)姆椒▽⒔M織和細(xì)胞破碎。常用的破碎組織細(xì)胞的方法有： 1. 機械破碎法這種方法是利用機械力的剪切作用，使細(xì)胞破碎。常用設(shè)備有，高速組織搗碎機、勻漿器、研缽等。 2. 滲透破碎法這種方法是在低滲條件使細(xì)胞溶脹而破碎。 3. 反復(fù)凍融法生物組織經(jīng)凍結(jié)后，細(xì)胞內(nèi)液結(jié)冰膨脹而使細(xì)胞脹破。這種方法簡單方便，但要注意那些對溫度變化敏感的蛋白質(zhì)不宜采用此法。 4. 超聲波法使用超聲波震蕩器使細(xì)胞膜上所受張力不均而使細(xì)胞破碎。 5. 酶法如用溶菌酶破壞微生物細(xì)胞等。江蘇化學(xué)分析蛋白純化系統(tǒng)制造廠家</p><p style="text-indent:25px">浙江樣品前處理蛋白純化系統(tǒng)</p><p style="text-indent:25px">蛋白質(zhì)分離純化步驟蛋白質(zhì)分離純化的一般原則：大多數(shù)蛋白質(zhì)在組織細(xì)胞中都是和核酸等生物分子結(jié)合在一起，而且每種類型的細(xì)胞都含有成千上萬種不同的蛋白質(zhì)。許多蛋白質(zhì)在結(jié)構(gòu)、性質(zhì)上有許多相似之處，所以蛋白質(zhì)的分離提純是一項復(fù)雜的工作。到目前為止，還沒有一**成的方法能把任何一種蛋白質(zhì)從復(fù)雜的混合物中提取出來。但是對于任何一種蛋白質(zhì)都有可能選擇一種較合適的分離純化程序以獲得高純度的制品。且分離的關(guān)鍵步驟、基本手段還是共同的。蛋白質(zhì)提純的目的是增加產(chǎn)品的純度和產(chǎn)量，同時又要保持和提高產(chǎn)品的生物活性。因此，要分離純化某一種蛋白質(zhì)，首先應(yīng)選擇一種含目的蛋白質(zhì)較豐富的材料。其次，應(yīng)設(shè)法避免蛋白質(zhì)變性，以制備有活性的蛋白質(zhì)。對于大多數(shù)蛋白質(zhì)來說，純化操作都是在0～4℃的低溫下進行的。同時也應(yīng)避免過酸、過堿的條件以及劇烈的攪拌和振蕩。另外，還要設(shè)法除去變性的蛋白質(zhì)和其它雜蛋白，從而達(dá)到增加純度和提高產(chǎn)量的目的。浙江樣品前處理蛋白純化系統(tǒng)</p><p style="text-indent:25px">蘇州英賽斯智能科技有限公司創(chuàng)辦于2017-01-09，是一家生產(chǎn)型的公司。經(jīng)過多年不斷的歷練探索和創(chuàng)新發(fā)展，是一家其他內(nèi)資企業(yè)企業(yè)，隨著市場的發(fā)展和生產(chǎn)的需求，與多家企業(yè)合作研究，在原有產(chǎn)品的基礎(chǔ)上經(jīng)過不斷改進，追求新型，在強化內(nèi)部管理，完善結(jié)構(gòu)調(diào)整的同時，優(yōu)良的質(zhì)量、合理的價格、完善的服務(wù)，在業(yè)界受到***好評。公司始終堅持客戶需求***的原則，致力于提供高質(zhì)量的[ "蛋白純化色譜系統(tǒng)", "凝膠凈化色譜系統(tǒng)", "制備液相色譜", "柱塞泵" ]。英賽斯以創(chuàng)造***產(chǎn)品及服務(wù)的理念，打造高指標(biāo)的服務(wù)，引導(dǎo)行業(yè)的發(fā)展。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/809522.html</p></div></div></div></div></div><div id="aipopls" class="page-right twoColRt"><div id="mardkwc" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="emo2cof" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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