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更新時間:2026-03-31
點擊次數:36
產品信息
貨號:STA-607
品名:HDL Purification Kit
規格:10 preps
品牌:CELL BIOLABS
技術疑問及解答(來源:CELL BIOLABS)
1. 洗滌緩沖液的制備與儲存
手冊中明確要求HDL重懸緩沖液需新鮮制備且不可儲存。對于1×HDL洗滌液,我個人建議每次新鮮配制,但將其置于4°C儲存直至使用是可行的,無需過度擔憂。
2. PBS配方建議
在此步驟中,您可根據下游應用需求選擇適合的緩沖液進行透析。目前未提及具體PBS配方(如pH、離子強度、是否含Ca2?/Mg2?或防腐劑如疊氮鈉)的強制要求,但需確保其與后續實驗兼容。
3. 透析膜選擇
對于貨號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;
• 更換緩沖液,繼續透析2-4小時;
• 再次更換緩沖液,過夜透析;
• 建議在4°C下進行透析以保持樣本穩定性。
4. 詳細透析流程
請參考上述第3題的答案(透析時長、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,因此我們從未對純化后的HDL進行過過濾除菌。理想情況下,純化后的脂蛋白可長期儲存于4°C;若樣本含50%甘油,則可儲存于-20°C。關于分裝體積,我們無法給出具體建議,需客戶根據下游應用自行決定。
7. 蛋白濃度測定方法推薦
手冊未明確蛋白濃度測定方法,建議客戶根據下游應用選擇合適方法。我們通常采用BCA assay測定總蛋白濃度。
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測定的濃度與ELISA結果進行過比較(僅通過ELISA確認ApoB的存在)。因此,無法提供校正方法或參考標準。關于殘留的非HDL蛋白,我們通過SDS-PAGE評估純度。
9. ApoM穩定性
很遺憾,我們從未使用Cat# STA-607評估過ApoM的穩定性(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合情況),也無相關數據證明其未解離。
10. S1P穩定性
同樣,我們從未評估過ApoM或S1P在純化過程中的穩定性(如離心、渦旋/重懸、透析等步驟是否會導致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顆粒的天然結構(包括脂質雙層及載脂蛋白組成),但我們從未對其結構或功能進行過驗證(如電子顯微鏡、天然凝膠電泳等數據)。
12. ApoM-S1P-HDL的沉淀行為
我們從未評估過ApoM或S1P與HDL的結合情況,因此無法確定ApoM-S1P-HDL是否會與總HDL共同沉淀,或是否存在選擇性丟失的風險。
13. 最終產物的組成
按照手冊操作獲得的最終產物是否為“總HDL"?是否包含攜帶ApoM的HDL亞群(即ApoM陽性HDL)?若有,是否有參考數據(如文獻或內部驗證)說明其在總HDL中的比例?
很遺憾,我們從未評估過ApoM或S1P的相關情況,無法回答此問題。此外,關于純化產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評估純度。
14. 直接兼容性
純化后的HDL產物(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,我們從未評估過ApoM或S1P的相關情況,無法給出建議。
15. 殘留干擾成分
純化后的HDL產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-抗原結合?這些殘留是否會影響免疫沉淀效率?
通過使用硫酸葡聚糖去除液并進行透析,可去除大部分干擾成分。
16. 抗體推薦
是否有經過驗證的ApoM免疫沉淀抗體推薦(如克隆號或目錄號)?關于抗體濃度、孵育條件或洗脫方法,是否有建議?
很遺憾,我們從未評估過ApoM或S1P的相關情況,無法提供推薦。
17. 產物組成細節
純化后的HDL產物中已知成分有哪些(如載脂蛋白種類、脂質組成、緩沖液成分)?是否有批間一致性數據?
我們通過SDS-PAGE評估純度,但未開展更深入的成分分析或批間一致性研究。
18. 直接純化產品及技術服務
貴公司是否提供直接純化ApoM-S1P-HDL的產品(如ApoM免疫沉淀試劑盒、預偶聯ApoM抗體 beads/瓊脂糖樹脂或S1P檢測產品)?若沒有直接產品,是否有技術建議或定制服務選項用于ApoM-S1P-HDL的純化?
很遺憾,我們從未評估過ApoM或S1P的相關情況,也不提供定制服務。
希望以上信息能對您有所幫助。若您有任何進一步的問題或疑慮,請隨時與我們聯系。
關鍵詞:cellbiolabs,cellbiolabs上海代理,cellbiolabs中國代理,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
更多產品信息,請聯系中國區域代理商:上海起發實驗試劑有限公司
如果您對任意產品或其他品牌感興趣,可通過“在線留言"功能留下您的需求
(注:本文內容基于品牌公開資料及行業常規信息整理,具體以品牌信息文檔為準。)
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