四川直銷蛋白純化系統(tǒng)***的選擇蘇州英賽斯智能科技供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="蛋白質(zhì)分離純化步驟（二）2.4樣品的進(jìn)一步分離純化用等電點(diǎn)沉淀法，四川直銷蛋白純化系統(tǒng)***的選擇、鹽析法所得到的蛋白質(zhì)一般含有其他蛋白質(zhì)雜質(zhì)，須進(jìn)一步分離提純才能得到有一定純度的樣品。常用的純化方法有：凝膠過濾層析、離子交換纖維素層析、親"><meta name="keywords" content="四川直銷蛋白純化系統(tǒng)***的選擇,蛋白純化系統(tǒng)"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_yiqiyibiao/">儀器儀表</a>?<a href="http://www.cdcfah.com/cp/second-yiqiyibiao_swyqxm/">生物儀器</a>?<a href="http://www.cdcfah.com/cp/third-swyqxm_qtswyq/">其他生物儀器</a>?四川直銷蛋白純化系統(tǒng)***的選擇蘇州英賽斯智能科技供應(yīng)</p><div id="gi2m208" class="leftbox clearfix"><h1>四川直銷蛋白純化系統(tǒng)***的選擇蘇州英賽斯智能科技供應(yīng)</h1><div id="eieg08u" class="proBig"><div id="su2cyw8" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171561815352/6371381715618153525073938.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="k2e08qq" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171561815352/6371381715618153525073938.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="igkiwiw" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>四川直銷蛋白純化系統(tǒng)***的選擇,蛋白純化系統(tǒng)</p><p><span>***更新：</span>2020-07-19 22:10:46</p><p><span id="click" >瀏覽次數(shù)：7次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="msyeuq0" 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(jī): </span>0512-63937378</p><p><span>地址: </span>吳江經(jīng)濟(jì)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="6qwkqms" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="828c80o" class="box"><p><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二） 2.4 樣品的進(jìn)一步分離純化用等電點(diǎn)沉淀法，四川直銷蛋白純化系統(tǒng)***的選擇、鹽析法所得到的蛋白質(zhì)一般含有其他蛋白質(zhì)雜質(zhì)，須進(jìn)一步分離提純才能得到有一定純度的樣品。常用的純化方法有：凝膠過濾層析、離子交換纖維素層析、親和層析等等。有時(shí)還需要這幾種方法聯(lián)合使用才能得到較高純度的蛋白質(zhì)樣品。 1. 凝膠過濾層析凝膠過濾層析（gel-filtration chromatography）又稱為分子排阻層析或分子篩層析。它是將葡聚糖凝膠（Sephadex）裝入一個(gè)柱子中，制成凝膠柱。這種凝膠顆粒具有網(wǎng)狀結(jié)構(gòu)，不同類型凝膠的網(wǎng)孔大小不同。當(dāng)把蛋白質(zhì)混合樣品加到凝膠柱中時(shí)，比凝膠網(wǎng)孔小的蛋白質(zhì)可進(jìn)入網(wǎng)孔內(nèi)，四川直銷蛋白純化系統(tǒng)***的選擇，而大于網(wǎng)孔的分子則不能進(jìn)入被排阻在凝膠顆粒之外。當(dāng)用洗脫液洗脫時(shí)，被排阻的分子量大的蛋白質(zhì)直接通過凝膠之間的縫隙先被洗脫下來，而比網(wǎng)孔小的蛋白質(zhì)可連續(xù)不斷地進(jìn)入網(wǎng)孔內(nèi)。這樣的小分子不但流經(jīng)的路程長，四川直銷蛋白純化系統(tǒng)***的選擇，而且受到來自凝膠內(nèi)部的阻力也很大，所以蛋白質(zhì)越小，從柱子上洗脫下來所需時(shí)間越長。由于不同蛋白質(zhì)的分子大小不同，進(jìn)入網(wǎng)孔的程度不同，因此流出的速度不同，洗脫所用體積及時(shí)間不同，從而達(dá)到分離的目的。四川直銷蛋白純化系統(tǒng)***的選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川直銷蛋白純化系統(tǒng)***的選擇,蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171561815352/6371381715618153525073938.jpg"></div><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二） 2.2 蛋白質(zhì)的抽提通常選擇適當(dāng)?shù)木彌_液溶劑把蛋白質(zhì)提取出來。抽提所用緩沖液的pH、離子強(qiáng)度、組成成分等條件的選擇應(yīng)根據(jù)欲制備的蛋白質(zhì)的性質(zhì)而定。如膜蛋白的抽提，抽提緩沖液中一般要加入表面活性劑（十二烷基磺酸鈉、tritonX-100等），使膜結(jié)構(gòu)破壞，利于蛋白質(zhì)與膜分離。在抽提過程中，應(yīng)注意溫度，避免劇烈攪拌等，以防止蛋白質(zhì)的變性。 2.3蛋白質(zhì)粗制品的獲得選用適當(dāng)?shù)姆椒▽⑺牡鞍踪|(zhì)與其它雜蛋白分離開來。比較方便的有效方法是根據(jù)蛋白質(zhì)溶解度的差異進(jìn)行的分離。常用的有下列幾種方法： 1. 等電點(diǎn)沉淀法不同蛋白質(zhì)的等電點(diǎn)不同，可用等電點(diǎn)沉淀法使它們相互分離。 2. 鹽析法不同蛋白質(zhì)鹽析所需要的鹽飽和度不同，所以可通過調(diào)節(jié)鹽濃度將目的蛋白沉淀析出。被鹽析沉淀下來的蛋白質(zhì)仍保持其天然性質(zhì)，并能再度溶解而不變性。 3. 有機(jī)溶劑沉淀法中性有機(jī)溶劑如乙醇、**，它們的介電常數(shù)比水低。能使大多數(shù)球狀蛋白質(zhì)在水溶液中的溶解度降低，進(jìn)而從溶液中沉淀出來，因此可用來沉淀蛋白質(zhì)。此外，有機(jī)溶劑會(huì)破壞蛋白質(zhì)表面的水化層，促使蛋白質(zhì)分子變得不穩(wěn)定而析出。由于有機(jī)溶劑會(huì)使蛋白質(zhì)變性，使用該法時(shí)，要注意在低溫下操作.山東專業(yè)蛋白純化系統(tǒng)上門維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川直銷蛋白純化系統(tǒng)***的選擇,蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171347973309/6371381713479733098214210.jpg"></div><p style="text-indent:25px">實(shí)驗(yàn)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(diǎn)及優(yōu)勢： – 模塊化設(shè)計(jì)，提供多個(gè)配置，滿足特殊工藝流程需求 - 低脈動(dòng)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(jī)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(shí)，降低維護(hù)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(dòng)進(jìn)樣閥、柱位閥等自動(dòng)化組件，提高了純化的自動(dòng)化程度 ; – 具有柱前、柱后、壓差報(bào)警，氣泡傳感器檢測等功能，極大的保護(hù)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(qiáng)大、性能先進(jìn)、高穩(wěn)定性的色譜數(shù)據(jù)管理系</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(tuán)。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?？山粨Q的基團(tuán)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(tuán)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(tuán)，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(tuán)帶負(fù)電荷，因此是一種陰離子交換劑。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(shí)，帶正電荷的蛋白質(zhì)不能結(jié)合而隨著洗脫液的流動(dòng)先被洗脫下來。帶負(fù)電荷的蛋白質(zhì)將被結(jié)合到柱上。結(jié)合力取決于彼此相反電荷基團(tuán)間的靜電吸引。然后選用一定pH和離子強(qiáng)度的緩沖液進(jìn)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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川直銷蛋白純化系統(tǒng)***的選擇,蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171674741306/6371381716747413062985954.jpg"></div><p style="text-indent:25px">三、蛋白質(zhì)分子量的測定 3.2 SDS-聚丙烯酰胺凝膠電泳法測定分子量蛋白質(zhì)在普通聚丙烯酰胺凝膠中的電泳速度取決于蛋白質(zhì)分子大小、所帶電荷的量以及分子形狀。而SDS-聚丙烯酰胺凝膠電泳與此不同的是在樣品及電泳緩沖液中加入了十二烷基***鈉（sodium dodecylsulfate,SDS）。SDS是一種陰離子去污劑，可使蛋白質(zhì)變性并解離成亞基。當(dāng)?shù)鞍踪|(zhì)樣品中加入SDS（一般加入量為0.1％）后，SDS與蛋白質(zhì)分子結(jié)合，使蛋白質(zhì)分子帶上大量的負(fù)電荷，這些電荷量遠(yuǎn)遠(yuǎn)超過蛋白質(zhì)分子原來所帶的電荷量，因而掩蓋了不同蛋白質(zhì)之間的電荷差異。所有結(jié)合SDS的蛋白質(zhì)-SDS復(fù)合物的形狀近似于長的橢園棒，它們的短軸是恒定的，而長軸與蛋白質(zhì)分子量的大小成正比。這樣，消除了蛋白質(zhì)之間原有的電荷和形狀的差異，電泳的速度只取決于蛋白質(zhì)分子量的大小。進(jìn)行凝膠電泳時(shí)，常常用一種染料作前沿物質(zhì)，蛋白質(zhì)分子在電泳中的移動(dòng)距離和前沿物質(zhì)移動(dòng)的距離之比值稱為相對遷移率，相對遷移率和分子質(zhì)量的對數(shù)成直線關(guān)系。以標(biāo)準(zhǔn)蛋白質(zhì)分子質(zhì)量的對數(shù)和其相對遷移率作圖，得到標(biāo)準(zhǔn)曲線。將未知蛋白質(zhì)在同樣條件下電泳，根據(jù)測得的樣品相對遷移率，從標(biāo)準(zhǔn)曲線上便可查出其分子量。江蘇直銷蛋白純化系統(tǒng)***的選擇</p><p style="text-indent:25px">四川直銷蛋白純化系統(tǒng)***的選擇</p><p style="text-indent:25px">國統(tǒng)局?jǐn)?shù)據(jù)顯示，2019年上半年儀器儀表大行業(yè)規(guī)模以上企業(yè)4927個(gè)，營收規(guī)模4002億元，營收同比增長7.57%；利潤總額為361億元，同比增長2.87%，比主營收入低4.70個(gè)百分點(diǎn)；一些中低檔產(chǎn)品已具有規(guī)模優(yōu)勢和國際市場競爭力。中國已成為[ "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" ]等產(chǎn)品的生產(chǎn)和出口大國，其他儀器設(shè)備等產(chǎn)品的出口也開始取得突破。在國民經(jīng)濟(jì)運(yùn)行中，機(jī)器人與自動(dòng)化設(shè)備、機(jī)械電子設(shè)備的研發(fā)、生產(chǎn)、銷售及技術(shù)咨詢；光學(xué)檢測設(shè)備、光電產(chǎn)品研發(fā)、制造、銷售；實(shí)驗(yàn)室設(shè)備、儀器儀表的研發(fā)、制造、銷售及提供相關(guān)的技術(shù)咨詢和售后服務(wù)；自營和代理各類商品及技術(shù)的進(jìn)出口業(yè)務(wù)（限定企業(yè)經(jīng)營或禁止進(jìn)出口的商品和技術(shù)除外）。（依法需經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)）等設(shè)備是提高勞動(dòng)生產(chǎn)率的倍增器，對國民經(jīng)濟(jì)有著巨大的輻射作用和影響力。美國商業(yè)部國家技術(shù)和標(biāo)準(zhǔn)研究院（NIST）提出的報(bào)告稱：美國90年代儀器儀表工業(yè)產(chǎn)值只占工業(yè)總產(chǎn)值的4%，但它對國民經(jīng)濟(jì)（GNP）的影響面卻達(dá)到66%。儀器儀表在工業(yè)發(fā)展中具有重要作用，這也使得儀器儀表得到快讀發(fā)展。各行各業(yè)對儀器儀表的市場需求也在不斷提升，加工企業(yè)正在發(fā)展中尋求技術(shù)創(chuàng)新和質(zhì)量提升。儀器儀表的質(zhì)量、性能關(guān)系到工業(yè)安全，必須重視。四川直銷蛋白純化系統(tǒng)***的選擇</p><p style="text-indent:25px">蘇州英賽斯智能科技有限公司是一家機(jī)器人與自動(dòng)化設(shè)備、機(jī)械電子設(shè)備的研發(fā)、生產(chǎn)、銷售及技術(shù)咨詢；光學(xué)檢測設(shè)備、光電產(chǎn)品研發(fā)、制造、銷售；實(shí)驗(yàn)室設(shè)備、儀器儀表的研發(fā)、制造、銷售及提供相關(guān)的技術(shù)咨詢和售后服務(wù)；自營和代理各類商品及技術(shù)的進(jìn)出口業(yè)務(wù)（限定企業(yè)經(jīng)營或禁止進(jìn)出口的商品和技術(shù)除外）。（依法需經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)）的公司，創(chuàng)建于2017-01-09。英賽斯擁有一支經(jīng)驗(yàn)豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團(tuán)隊(duì)，以高度的專注和執(zhí)著為客戶提供[ "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" ]。公司終堅(jiān)持自主研發(fā)創(chuàng)新發(fā)展理念，不斷優(yōu)化的技術(shù)、產(chǎn)品為客戶帶來效益，目前年?duì)I業(yè)額達(dá)到50-100萬元。英賽斯始終關(guān)注儀器儀表行業(yè)。海納百川，有容乃大，國內(nèi)外同行的智慧都是促使我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/654581.html</p></div></div></div></div></div><div id="kuk0kki" class="page-right twoColRt"><div id="oai0yqw" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="icsqesi" class="recomPic likePro"><a 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