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更新時(shí)間:2026-03-31
點(diǎn)擊次數(shù):37
產(chǎn)品信息
貨號(hào):STA-607
品名:HDL Purification Kit
規(guī)格:10 preps
品牌:CELL BIOLABS
技術(shù)疑問及解答(來源:CELL BIOLABS)
1. 洗滌緩沖液的制備與儲(chǔ)存
手冊(cè)中明確要求HDL重懸緩沖液需新鮮制備且不可儲(chǔ)存。對(duì)于1×HDL洗滌液,我個(gè)人建議每次新鮮配制,但將其置于4°C儲(chǔ)存直至使用是可行的,無需過度擔(dān)憂。
2. PBS配方建議
在此步驟中,您可根據(jù)下游應(yīng)用需求選擇適合的緩沖液進(jìn)行透析。目前未提及具體PBS配方(如pH、離子強(qiáng)度、是否含Ca2?/Mg2?或防腐劑如疊氮鈉)的強(qiáng)制要求,但需確保其與后續(xù)實(shí)驗(yàn)兼容。
3. 透析膜選擇
對(duì)于貨號(hào)Cat# STA-607,透析方案可采用任意透析方法。例如,可使用賽默飛世爾的Slide-A-Lyzer MINI透析裝置。我們通常推薦使用10 kDa截留分子量(MWCO)的透析膜,但其他尺寸也可接受。操作流程需遵循說明書,一般步驟如下:
• 用300倍樣本體積的緩沖液透析2-4小時(shí);
• 更換緩沖液,繼續(xù)透析2-4小時(shí);
• 再次更換緩沖液,過夜透析;
• 建議在4°C下進(jìn)行透析以保持樣本穩(wěn)定性。
4. 詳細(xì)透析流程
請(qǐng)參考上述第3題的答案(透析時(shí)長(zhǎng)、緩沖液更換頻率及溫度要求均已涵蓋)。
5. 透析后樣本情況
• 最終體積:Cat# STA-607的典型產(chǎn)量約為7 ml(來自人血清或血漿樣本);
• 蛋白濃度范圍:純化后HDL的濃度約為4500 µg/ml。
6. 透析后樣本處理
需注意,Cat# STA-607提供的溶液并非無菌,因此我們從未對(duì)純化后的HDL進(jìn)行過過濾除菌。理想情況下,純化后的脂蛋白可長(zhǎng)期儲(chǔ)存于4°C;若樣本含50%甘油,則可儲(chǔ)存于-20°C。關(guān)于分裝體積,我們無法給出具體建議,需客戶根據(jù)下游應(yīng)用自行決定。
7. 蛋白濃度測(cè)定方法推薦
手冊(cè)未明確蛋白濃度測(cè)定方法,建議客戶根據(jù)下游應(yīng)用選擇合適方法。我們通常采用BCA assay測(cè)定總蛋白濃度。
8. 總蛋白濃度與HDL濃度的等效性
遺憾的是,我們從未將BCA assay測(cè)定的濃度與ELISA結(jié)果進(jìn)行過比較(僅通過ELISA確認(rèn)ApoB的存在)。因此,無法提供校正方法或參考標(biāo)準(zhǔn)。關(guān)于殘留的非HDL蛋白,我們通過SDS-PAGE評(píng)估純度。
9. ApoM穩(wěn)定性
很遺憾,我們從未使用Cat# STA-607評(píng)估過ApoM的穩(wěn)定性(包括其在硫酸葡聚糖沉淀、離心、重懸、洗滌及透析過程中的結(jié)合情況),也無相關(guān)數(shù)據(jù)證明其未解離。
10. S1P穩(wěn)定性
同樣,我們從未評(píng)估過ApoM或S1P在純化過程中的穩(wěn)定性(如離心、渦旋/重懸、透析等步驟是否會(huì)導(dǎo)致S1P與ApoM解離或部分丟失)。
11. HDL顆粒完整性
該試劑盒旨在維持HDL顆粒的天然結(jié)構(gòu)(包括脂質(zhì)雙層及載脂蛋白組成),但我們從未對(duì)其結(jié)構(gòu)或功能進(jìn)行過驗(yàn)證(如電子顯微鏡、天然凝膠電泳等數(shù)據(jù))。
12. ApoM-S1P-HDL的沉淀行為
我們從未評(píng)估過ApoM或S1P與HDL的結(jié)合情況,因此無法確定ApoM-S1P-HDL是否會(huì)與總HDL共同沉淀,或是否存在選擇性丟失的風(fēng)險(xiǎn)。
13. 最終產(chǎn)物的組成
按照手冊(cè)操作獲得的最終產(chǎn)物是否為“總HDL"?是否包含攜帶ApoM的HDL亞群(即ApoM陽(yáng)性HDL)?若有,是否有參考數(shù)據(jù)(如文獻(xiàn)或內(nèi)部驗(yàn)證)說明其在總HDL中的比例?
很遺憾,我們從未評(píng)估過ApoM或S1P的相關(guān)情況,無法回答此問題。此外,關(guān)于純化產(chǎn)物中是否殘留其他脂蛋白(如LDL、VLDL)或血漿蛋白,我們通過SDS-PAGE評(píng)估純度。
14. 直接兼容性
純化后的HDL產(chǎn)物(透析后)是否可直接用于ApoM免疫沉淀?是否需要額外的緩沖液交換或純化步驟(如脫鹽、超濾)?
很遺憾,我們從未評(píng)估過ApoM或S1P的相關(guān)情況,無法給出建議。
15. 殘留干擾成分
純化后的HDL產(chǎn)物中是否有殘留成分(如硫酸葡聚糖、Tris、沉淀試劑等)可能干擾抗體-抗原結(jié)合?這些殘留是否會(huì)影響免疫沉淀效率?
通過使用硫酸葡聚糖去除液并進(jìn)行透析,可去除大部分干擾成分。
16. 抗體推薦
是否有經(jīng)過驗(yàn)證的ApoM免疫沉淀抗體推薦(如克隆號(hào)或目錄號(hào))?關(guān)于抗體濃度、孵育條件或洗脫方法,是否有建議?
很遺憾,我們從未評(píng)估過ApoM或S1P的相關(guān)情況,無法提供推薦。
17. 產(chǎn)物組成細(xì)節(jié)
純化后的HDL產(chǎn)物中已知成分有哪些(如載脂蛋白種類、脂質(zhì)組成、緩沖液成分)?是否有批間一致性數(shù)據(jù)?
我們通過SDS-PAGE評(píng)估純度,但未開展更深入的成分分析或批間一致性研究。
18. 直接純化產(chǎn)品及技術(shù)服務(wù)
貴公司是否提供直接純化ApoM-S1P-HDL的產(chǎn)品(如ApoM免疫沉淀試劑盒、預(yù)偶聯(lián)ApoM抗體 beads/瓊脂糖樹脂或S1P檢測(cè)產(chǎn)品)?若沒有直接產(chǎn)品,是否有技術(shù)建議或定制服務(wù)選項(xiàng)用于ApoM-S1P-HDL的純化?
很遺憾,我們從未評(píng)估過ApoM或S1P的相關(guān)情況,也不提供定制服務(wù)。
希望以上信息能對(duì)您有所幫助。若您有任何進(jìn)一步的問題或疑慮,請(qǐng)隨時(shí)與我們聯(lián)系。
關(guān)鍵詞:cellbiolabs,cellbiolabs上海代理,cellbiolabs中國(guó)代理,cellbiolabs北京代理,cellbiolabs江蘇代理, cellbiolabs廣東代理,VPK-156, MET-5095, CBA-5020, XDN-5114, CBA-201, PRB-5079, MET-5011, VPK-107, VPK-120, MET-5090, VPK-108-H, AAV-200, CBA-5021
更多產(chǎn)品信息,請(qǐng)聯(lián)系中國(guó)區(qū)域代理商:上海起發(fā)實(shí)驗(yàn)試劑有限公司
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(注:本文內(nèi)容基于品牌公開資料及行業(yè)常規(guī)信息整理,具體以品牌信息文檔為準(zhǔn)。)
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