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class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="gkhjbsu" class="twoCol"><div id="mb73j8p" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產品供應</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>?四川蛋白純化系統(tǒng)制造廠家蘇州英賽斯智能科技供應</p><div id="ynphofm" class="leftbox clearfix"><h1>四川蛋白純化系統(tǒng)制造廠家蘇州英賽斯智能科技供應</h1><div id="t8bhjq3" class="proBig"><div id="qzbn88b" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171935864644/6371381719358646441189533.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="smo8smt" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171935864644/6371381719358646441189533.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="v2ugvwn" class="content"><p><span>需求數量：</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>產品關鍵詞：</span>四川蛋白純化系統(tǒng)制造廠家,蛋白純化系統(tǒng)</p><p><span>***更新：</span>2020-08-26 11:02:22</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="x2wdfbd" 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>網址: </span>http://www.inscinstech.com.cn</p><p><span>手機: </span>0512-63937378</p><p><span>地址: </span>吳江經濟技術開發(fā)區(qū)聯楊路南側、龍橋路西側</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="utvseqn" class="page-proshow02"><p class="title">詳細說明</p><div id="blsu3nz" class="box"><p><p style="text-indent:25px">三、蛋白質分子量的測定 3.3 沉降法沉降法又稱超速離心法。蛋白質溶液在受到強大的離心力作用時，蛋白質分子趨于下沉，沉降速度與蛋白質分子的大小，四川蛋白純化系統(tǒng)制造廠家、密度和分子形狀有關，也與溶劑的密度和粘度有關。蛋白質顆粒在離心場中的沉降速度用每單位時間內顆粒下沉的距離來表示。在離心場中，蛋白質分子所受到的凈離心力（離心力減去浮力）與溶劑的摩擦力平衡時，每單位離心場強度的沉降速度稱為沉降系數（Sedimentation Coefficient）。國際上采用Svedberg單位作為沉降系數的單位，用S表示，以紀念超速離心法的創(chuàng)始人，瑞典***的蛋白質化學家T，四川蛋白純化系統(tǒng)制造廠家，四川蛋白純化系統(tǒng)制造廠家.Svedberg。一個Svedberg單位（或直接稱一個S）為1×10—13s。蛋白質的沉降系數大約在1×10—13～200×10—13s范圍內，即1S～200S。四川蛋白純化系統(tǒng)制造廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川蛋白純化系統(tǒng)制造廠家,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">三、蛋白質分子量的測定蛋白質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入膠粒，而大于孔隙的分子則不能進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先被洗脫下來，隨后能夠進入顆粒的蛋白質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分子量范圍，在此范圍內，分子量的對數和洗脫體積之間成線性關系。因此，用幾種已知分子量的蛋白質為標準進行層析分析，以每種蛋白質的洗脫體積對它們的分子量的對數作圖，繪制出標準洗脫曲線。未知蛋白質在同樣的條件下進行層析分析，根據其所用的洗脫體積，從標準洗脫曲線上可求出此未知蛋白質對應的分子量來。四川蛋白純化系統(tǒng)制造廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川蛋白純化系統(tǒng)制造廠家,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">蛋白質分離純化步驟（二） 2.4.3. 親和層析親和層析（affinity-chromatography）分離技術是根據許多蛋白質對特定的化學基團具有專一性結合的原理。這些能被生物大分子如蛋白質所識別并與之結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的化學反應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大分子與其配基的結合，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，待純化的蛋白質與其特異性配基結合而被吸附到柱上，其他蛋白因不能與葡萄糖配基結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，即可把該蛋白質洗脫下來，達到與其它蛋白質分離的目的。</p><p style="text-indent:25px">蛋白質分離純化步驟（二） 2.2 蛋白質的抽提通常選擇適當的緩沖液溶劑把蛋白質提取出來。抽提所用緩沖液的pH、離子強度、組成成分等條件的選擇應根據欲制備的蛋白質的性質而定。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），使膜結構破壞，利于蛋白質與膜分離。在抽提過程中，應注意溫度，避免劇烈攪拌等，以防止蛋白質的變性。 2.3蛋白質粗制品的獲得選用適當的方法將所要的蛋白質與其它雜蛋白分離開來。比較方便的有效方法是根據蛋白質溶解度的差異進行的分離。常用的有下列幾種方法： 1. 等電點沉淀法不同蛋白質的等電點不同，可用等電點沉淀法使它們相互分離。 2. 鹽析法不同蛋白質鹽析所需要的鹽飽和度不同，所以可通過調節(jié)鹽濃度將目的蛋白沉淀析出。被鹽析沉淀下來的蛋白質仍保持其天然性質，并能再度溶解而不變性。 3. 有機溶劑沉淀法中性有機溶劑如乙醇、**，它們的介電常數比水低。能使大多數球狀蛋白質在水溶液中的溶解度降低，進而從溶液中沉淀出來，因此可用來沉淀蛋白質。此外，有機溶劑會破壞蛋白質表面的水化層，促使蛋白質分子變得不穩(wěn)定而析出。由于有機溶劑會使蛋白質變性，使用該法時，要注意在低溫下操作.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川蛋白純化系統(tǒng)制造廠家,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">蛋白質分離純化步驟蛋白質分離純化的一般原則：大多數蛋白質在組織細胞中都是和核酸等生物分子結合在一起，而且每種類型的細胞都含有成千上萬種不同的蛋白質。許多蛋白質在結構、性質上有許多相似之處，所以蛋白質的分離提純是一項復雜的工作。到目前為止，還沒有一**成的方法能把任何一種蛋白質從復雜的混合物中提取出來。但是對于任何一種蛋白質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。且分離的關鍵步驟、基本手段還是共同的。蛋白質提純的目的是增加產品的純度和產量，同時又要保持和提高產品的生物活性。因此，要分離純化某一種蛋白質，首先應選擇一種含目的蛋白質較豐富的材料。其次，應設法避免蛋白質變性，以制備有活性的蛋白質。對于大多數蛋白質來說，純化操作都是在0～4℃的低溫下進行的。同時也應避免過酸、過堿的條件以及劇烈的攪拌和振蕩。另外，還要設法除去變性的蛋白質和其它雜蛋白，從而達到增加純度和提高產量的目的。樣品前處理化學分析蛋白純化系統(tǒng)上門安裝</p><p style="text-indent:25px">四川蛋白純化系統(tǒng)制造廠家</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) 主要應用領域： – 蛋白純化系統(tǒng)主要應用于單抗、重組蛋白、疫苗、生化藥、、天然產物和多糖等生物制藥領域。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) ：產品特點及優(yōu)勢： – 模塊化設計，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)定性的色譜數據管理系四川蛋白純化系統(tǒng)制造廠家</p><p style="text-indent:25px">蘇州英賽斯智能科技有限公司成立于2017-01-09，專業(yè)機器人與自動化設備、機械電子設備的研發(fā)、生產、銷售及技術咨詢；光學檢測設備、光電產品研發(fā)、制造、銷售；實驗室設備、儀器儀表的研發(fā)、制造、銷售及提供相關的技術咨詢和售后服務；自營和代理各類商品及技術的進出口業(yè)務（限定企業(yè)經營或禁止進出口的商品和技術除外）。（依法需經批準的項目，經相關部門批準后方可開展經營活動）等多項業(yè)務，主營業(yè)務涵蓋蛋白純化色譜系統(tǒng)，凝膠凈化色譜系統(tǒng)，制備液相色譜，柱塞泵。目前我公司在職員工達到11~50人人，是一個有活力有能力有創(chuàng)新精神的高速團隊。公司以誠信為本，業(yè)務領域涵蓋蛋白純化色譜系統(tǒng)，凝膠凈化色譜系統(tǒng)，制備液相色譜，柱塞泵，我們本著對客戶負責，對員工負責，更是對公司發(fā)展負責的態(tài)度，爭取做到讓每位客戶滿意。公司力求給客戶提供全數質量服務，我們相信誠實正直、開拓進取地為公司發(fā)展做正確的事情，將為公司和個人帶來共同的利益和進步。經過幾年的發(fā)展，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，柱塞泵行業(yè)出名企業(yè)。</p></p><br /><p>文章來源地址: 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