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href="http://www.cdcfah.com/cp/third-swyqxm_qtswyq/">其他生物儀器</a>?浙江樣品前處理蛋白純化系統(tǒng)廠家報價蘇州英賽斯智能科技供應(yīng)</p><div id="le3mtf7" class="leftbox clearfix"><h1>浙江樣品前處理蛋白純化系統(tǒng)廠家報價蘇州英賽斯智能科技供應(yīng)</h1><div id="8l8ofco" class="proBig"><div id="ftk3qpr" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138172066720957/6371381720667209577791021.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8ixogs8" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138172066720957/6371381720667209577791021.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wdprjqs" 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)廠家報價,蛋白純化系統(tǒng)</p><p><span>***更新：</span>2020-11-29 20:05:45</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="grm798l" 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="camjvmy" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="u337wik" class="box"><p><p style="text-indent:25px">三、蛋白質(zhì)分子量的測定蛋白質(zhì)分子量測定的方法很多，目前常用的方法有以下幾種。 3.1 凝膠過濾法凝膠過濾法測定蛋白質(zhì)分子量的原理如“分離純化方法”中所述。一定型號的凝膠顆粒上具有一定大小的孔隙，只允許較小的分子進(jìn)入膠粒，而大于孔隙的分子則不能進(jìn)入膠粒而被排阻在膠粒外面。用洗脫液洗脫時，被排阻的分子量大的蛋白質(zhì)先被洗脫下來，隨后能夠進(jìn)入顆粒的蛋白質(zhì)也按分子量大小而先后被洗脫下來，分子量越小的越后被洗脫下來。由于不同排阻范圍的葡聚糖凝膠有一特定的蛋白質(zhì)分子量范圍，浙江樣品前處理蛋白純化系統(tǒng)廠家報價，浙江樣品前處理蛋白純化系統(tǒng)廠家報價，在此范圍內(nèi)，分子量的對數(shù)和洗脫體積之間成線性關(guān)系，浙江樣品前處理蛋白純化系統(tǒng)廠家報價。因此，用幾種已知分子量的蛋白質(zhì)為標(biāo)準(zhǔn)進(jìn)行層析分析，以每種蛋白質(zhì)的洗脫體積對它們的分子量的對數(shù)作圖，繪制出標(biāo)準(zhǔn)洗脫曲線。未知蛋白質(zhì)在同樣的條件下進(jìn)行層析分析，根據(jù)其所用的洗脫體積，從標(biāo)準(zhǔn)洗脫曲線上可求出此未知蛋白質(zhì)對應(yīng)的分子量來。浙江樣品前處理蛋白純化系統(tǒng)廠家報價</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)廠家報價,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） 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。可交換的基團(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，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。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。江蘇智能蛋白純化系統(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)廠家報價,蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171935864644/6371381719358646441189533.jpg"></div><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、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，比凝膠網(wǎng)孔小的蛋白質(zhì)可進(jìn)入網(wǎng)孔內(nèi)，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，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，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，洗脫所用體積及時間不同，從而達(dá)到分離的目的。</p><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(jī)械破碎法這種方法是利用機(jī)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(jī)、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。</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)廠家報價,蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138172282251484/6371381722822514847644105.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，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距離和前沿物質(zhì)移動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。江蘇智能蛋白純化系統(tǒng)***的選擇</p><p style="text-indent:25px">浙江樣品前處理蛋白純化系統(tǒng)廠家報價</p><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，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(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，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，自動進(jìn)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(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)管理系浙江樣品前處理蛋白純化系統(tǒng)廠家報價</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）的公司，是一家集研發(fā)、設(shè)計、生產(chǎn)和銷售為一體的專業(yè)化公司。公司自創(chuàng)立以來，投身于蛋白純化色譜系統(tǒng)，凝膠凈化色譜系統(tǒng)，制備液相色譜，柱塞泵，是儀器儀表的主力軍。英賽斯不斷開拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺，以應(yīng)用為重點(diǎn)，以服務(wù)為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務(wù)。英賽斯創(chuàng)始人李大為，始終關(guān)注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務(wù)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2195672.html</p></div></div></div></div></div><div id="y8htlxe" class="page-right twoColRt"><div id="sbnkmy7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hg8iphe" class="recomPic likePro"><a 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