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更新时间:2026-03-31
点击次数:23
产品信息
货号:STA-607
品名:HDL Purification Kit
规格:10 preps
品牌:CELL BIOLABS
技术疑问及解答(来源:CELL BIOLABS)
1. 洗涤缓冲液的制备与储存
手册中明确要求HDL重悬缓冲液需新鲜制备且不可储存。对于1×HDL洗涤液,我个人建议每次新鲜配制,但将其置于4°C储存直至使用是可行的,无需过度担忧。
2. PBS配方建议
在此步骤中,您可根据下游应用需求选择适合的缓冲液进行透析。目前未提及具体PBS配方(如pH、离子强度、是否含Ca²⁺/Mg²⁺或防腐剂如叠氮钠)的强制要求,但需确保其与后续实验兼容。
3. 透析膜选择
对于货号Cat# STA-607,透析方案可采用任意透析方法。例如,可使用赛默飞世尔的Slide-A-Lyzer MINI透析装置。我们通常推荐使用10 kDa截留分子量(MWCO)的透析膜,但其他尺寸也可接受。操作流程需遵循说明书,一般步骤如下:
• 用300倍样本体积的缓冲液透析2-4小时;
• 更换缓冲液,继续透析2-4小时;
• 再次更换缓冲液,过夜透析;
• 建议在4°C下进行透析以保持样本稳定性。
4. 详细透析流程
请参考上述第3题的答案(透析时长、缓冲液更换频率及温度要求均已涵盖)。
5. 透析后样本情况
• 最终体积:Cat# STA-607的典型产量约为7 ml(来自人血清或血浆样本);
• 蛋白浓度范围:纯化后HDL的浓度约为4500 µg/ml。
6. 透析后样本处理
需注意,Cat# STA-607提供的溶液并非无菌,因此我们从未对纯化后的HDL进行过过滤除菌。理想情况下,纯化后的脂蛋白可长期储存于4°C;若样本含50%甘油,则可储存于-20°C。关于分装体积,我们无法给出具体建议,需客户根据下游应用自行决定。
7. 蛋白浓度测定方法推荐
手册未明确蛋白浓度测定方法,建议客户根据下游应用选择合适方法。我们通常采用BCA assay测定总蛋白浓度。
8. 总蛋白浓度与HDL浓度的等效性
遗憾的是,我们从未将BCA assay测定的浓度与ELISA结果进行过比较(仅通过ELISA确认ApoB的存在)。因此,无法提供校正方法或参考标准。关于残留的非HDL蛋白,我们通过SDS-PAGE评估纯度。
9. ApoM稳定性
很遗憾,我们从未使用Cat# STA-607评估过ApoM的稳定性(包括其在硫酸葡聚糖沉淀、离心、重悬、洗涤及透析过程中的结合情况),也无相关数据证明其未解离。
10. S1P稳定性
同样,我们从未评估过ApoM或S1P在纯化过程中的稳定性(如离心、涡旋/重悬、透析等步骤是否会导致S1P与ApoM解离或部分丢失)。
11. HDL颗粒完整性
该试剂盒旨在维持HDL颗粒的天然结构(包括脂质双层及载脂蛋白组成),但我们从未对其结构或功能进行过验证(如电子显微镜、天然凝胶电泳等数据)。
12. ApoM-S1P-HDL的沉淀行为
我们从未评估过ApoM或S1P与HDL的结合情况,因此无法确定ApoM-S1P-HDL是否会与总HDL共同沉淀,或是否存在选择性丢失的风险。
13. 最终产物的组成
按照手册操作获得的最终产物是否为“总HDL"?是否包含携带ApoM的HDL亚群(即ApoM阳性HDL)?若有,是否有参考数据(如文献或内部验证)说明其在总HDL中的比例?
很遗憾,我们从未评估过ApoM或S1P的相关情况,无法回答此问题。此外,关于纯化产物中是否残留其他脂蛋白(如LDL、VLDL)或血浆蛋白,我们通过SDS-PAGE评估纯度。
14. 直接兼容性
纯化后的HDL产物(透析后)是否可直接用于ApoM免疫沉淀?是否需要额外的缓冲液交换或纯化步骤(如脱盐、超滤)?
很遗憾,我们从未评估过ApoM或S1P的相关情况,无法给出建议。
15. 残留干扰成分
纯化后的HDL产物中是否有残留成分(如硫酸葡聚糖、Tris、沉淀试剂等)可能干扰抗体-抗原结合?这些残留是否会影响免疫沉淀效率?
通过使用硫酸葡聚糖去除液并进行透析,可去除大部分干扰成分。
16. 抗体推荐
是否有经过验证的ApoM免疫沉淀抗体推荐(如克隆号或目录号)?关于抗体浓度、孵育条件或洗脱方法,是否有建议?
很遗憾,我们从未评估过ApoM或S1P的相关情况,无法提供推荐。
17. 产物组成细节
纯化后的HDL产物中已知成分有哪些(如载脂蛋白种类、脂质组成、缓冲液成分)?是否有批间一致性数据?
我们通过SDS-PAGE评估纯度,但未开展更深入的成分分析或批间一致性研究。
18. 直接纯化产品及技术服务
贵公司是否提供直接纯化ApoM-S1P-HDL的产品(如ApoM免疫沉淀试剂盒、预偶联ApoM抗体 beads/琼脂糖树脂或S1P检测产品)?若没有直接产品,是否有技术建议或定制服务选项用于ApoM-S1P-HDL的纯化?
很遗憾,我们从未评估过ApoM或S1P的相关情况,也不提供定制服务。
希望以上信息能对您有所帮助。若您有任何进一步的问题或疑虑,请随时与我们联系。
关键词:cellbiolabs,cellbiolabs上海代理,cellbiolabs中国代理,cellbiolabs北京代理,cellbiolabs江苏代理, cellbiolabs广东代理,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
更多产品信息,请联系中国区域代理商:上海起发实验试剂有限公司
如果您对任意产品或其他品牌感兴趣,可通过“在线留言"功能留下您的需求
(注:本文内容基于品牌公开资料及行业常规信息整理,具体以品牌信息文档为准。)
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