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UltraBio™ Anti-V5 Magnetic Beads (Anti-V5磁珠)

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货号 (SKU) 包装规格 是否现货 价格 数量
A751545-500μl
500μL 期货 Stock Image
A751545-2ml
2ml 期货 Stock Image
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蛋白纯化 (44)

基本描述

产品名称 UltraBio™ Anti-V5 Magnetic Beads (Anti-V5磁珠)
产品介绍

阿拉丁生产的UltraBio™ Anti-V5 Magnetic Beads,即Anti-V5磁珠,也称Anti-V5免疫磁珠或V5抗体磁珠,是由高品质的V5小鼠单克隆抗体与纳米级氨基磁珠共价偶联而成,可特异性地与动植物或微生物裂解液、血清、腹水等中含有V5标签的蛋白结合,从而用于带有V5标签的融合蛋白或其蛋白复合物的免疫沉淀(Immunoprecipitation, IP)、免疫共沉淀(Co-IP)或纯化。V5标签(V5-tag)、Flag标签、Myc标签(Myc-tag)、HA标签(HA-tag)、His标签(His-tag)和GST标签等是表达载体上最常见的一些标签,通过与这些标签的融合表达可以非常方便地检测目的蛋白及与目的蛋白相互结合的蛋白,也可以非常方便地用于目的蛋白的纯化。V5-tag是从猴副流感病毒V5中分离得到的由14个氨基酸(GKPIPNPLLGLDST)组成的多肽,通过基因重组技术把V5-tag的核酸序列与目的基因的5’端或3’端连接,就可以最终表达形成V5-tag的目的蛋白。V5-tag具有以下优点:V5-tag通常不会与目的蛋白相互作用,并且大多数情况下不会影响目的蛋白的功能;V5-tag作为蛋白标签,后续通过V5抗体、Anti-V5磁珠即可对目的基因的表达、定位及功能进行检测或对目的蛋白进行纯化、免疫沉淀或免疫共沉淀等。基于以上优点,V5标签已被广泛应用于蛋白表达、纯化、鉴定、相互作用和功能等多方面的研究。UltraBio™ Anti-V5 Magnetic Beads (Anti-V5磁珠),可以特异性地结合V5标签融合蛋白,并可以借助磁力架等磁分离设备非常便捷地应用于带有V5标签的融合蛋白或其蛋白复合物的免疫沉淀或纯化等实验。本产品进行免疫沉淀的流程参考图1。图1. 阿拉丁的UltraBio™ Anti-V5 Magnetic Beads (Anti-V5磁珠)免疫沉淀流程图。本产品特异性强、靶蛋白结合量高。与国内外大多数的同类产品相比,本产品抗体结合密度高,对带有V5标签蛋白的结合具有很强的特异性,并且本产品磁珠粒径小,不易产生非特异吸附。本产品每毫升磁珠悬浊液含约10mg磁珠,含有不少于0.6mg V5抗体,通常可结合不少于0.6mg V5标签融合蛋白,具体的最大结合量和标签蛋白的分子量大小等相关。每500微升样品,通常仅需使用10-20微升磁珠悬浊液,就可以高效地进行免疫沉淀实验。本产品可结合多种形式的V5标签蛋白。本产品可特异性地结合N端V5融合蛋白(V5-Protein)、C端V5融合蛋白(Protein-V5)。本产品结合目的蛋白速度快。本产品使用了纳米级磁珠(~200nm),具有超大的比表面积,便于抗体和抗原的快速有效结合。通常10分钟内即可完成抗原吸附的过程,30分钟内完成目的蛋白免疫沉淀操作。缩短操作时间可以有效避免在长时间操作过程中目的蛋白的降解或变性,充分保证目的蛋白的活性。本产品可选择多种洗脱方法。本产品可以根据目的蛋白的结构、生物学功能及后续应用的要求等,使用多种洗脱方法,包括SDS-PAGE上样缓冲液、V5多肽和酸性等洗脱液进行洗脱。特别是V5多肽洗脱后不会包含抗体的轻链和重链,可以有效解决免疫沉淀后Western实验中轻链和重链的干扰问题。本产品用于V5融合蛋白的免疫沉淀效果参考图2。图2. UltraBio™ Anti-V5 Magnetic Beads (Anti-V5磁珠)用于V5融合蛋白的免疫沉淀效果图。HEK293T (人胚肾细胞)转染V5融合蛋白质粒36小时后,经Western及IP细胞裂解液裂解。样品1为Input,即全细胞裂解液(total);样品2为Mouse IgG Magnetic Beads (小鼠IgG免疫磁珠) 免疫沉淀后经SDS-PAGE蛋白上样缓冲液(1X) 洗脱后的样品,该Mouse IgG是正常的小鼠IgG (Normal Mouse IgG),为阴性对照;样品3为本磁珠免疫沉淀后使用SDS-PAGE蛋白上样缓冲液(1X)洗脱的样品。Western印迹成像由Imager 600化学发光成像系统完成。实际结果会因实验条件、检测仪器等的不同而存在差异,图中数据仅供参考。本产品的主要指标如下表:


注意事项

由于V5-tag与V5抗体的结合力非常强,V5多肽竞争洗脱和酸性洗脱的效果可能会不太理想,建议优先使用SDS-PAGE上样缓冲液洗脱法。本产品需维持pH为6-8,避免高速离心和干燥;请勿长时间将磁珠置于磁场中,否则可能会引起磁珠聚团。本产品使用前要适当充分重悬,即颠倒若干次使磁珠混合均匀,混匀操作须轻柔,不宜剧烈涡旋震荡等,避免抗体变性等。在免疫沉淀或纯化时,建议设置阳性和阴性对照组。蛋白样品收集后宜尽快完成纯化工作,并应始终放置在4℃或冰浴,以减缓蛋白降解或变性。为有效抑制蛋白降解,可以在蛋白样品中添加适量的蛋白酶抑制剂混合物,例如阿拉丁的P1005/P1006蛋白酶抑制剂混合物(通用型)、P1048/P1049 蛋白酶磷酸酶抑制剂混合物(通用型, 质谱兼容, 50X)、P1010/P1011 蛋白酶抑制剂混合物(哺乳动物样品抽提用, 100X)、P1050/P1051 蛋白酶磷酸酶抑制剂混合物(哺乳动物样品抽提用, 50X)等。如果使用真空泵等仪器吸取上清液,须注意真空泵的吸液强度,以免吸力过大而吸取到聚集的磁珠。酸性溶液洗脱时磁珠可能会发生聚集,属于正常现象,不影响磁珠的正常使用。0.1%的非离子型去垢剂(如Triton X-100、Tween-20或NP-40)可有效防止磁珠聚集,并且不会影响磁珠的抗体结合效率。高浓度的DTT、巯基乙醇、盐酸胍等对本产品与标签蛋白的结合可能有一定影响,但Western及IP细胞裂解液、RIPA裂解液或NP-40裂解液等都完全适用。阿拉丁生产的不同裂解液的主要特点和差异,以及如何选择裂解液可参考我们的相关网页:http://www.aladdin-e.com/support/lysis-buffer.htm。本产品仅限于专业人员的科学研究用,不得用于临床诊断或治疗,不得用于食品或药品,不得存放于普通住宅内。为了您的安全和健康,请穿实验服并戴一次性手套操作。


使用说明

1.样品的制备。a.选择合适的裂解液,用于制备细胞或组织的裂解液。优先推荐选择阿拉丁生产的P0013 Western及IP细胞裂解液用于细胞或组织样品的裂解。根据特定的实验目的,如有必要,也可以使用阿拉丁生产的P0013B RIPA裂解液(强)、P0013C RIPA裂解液(中)或P0013D RIPA裂解液(弱)用于样品的制备。如果使用自行配制的或其它公司生产的裂解液,需要确保裂解液的pH为6-8。b.具体的细胞或组织样品裂解的制备步骤请参考裂解液的使用说明。制备好的裂解液上清宜置于冰上或4℃存放,随后即可用于免疫沉淀或免疫共沉淀、标签蛋白的纯化等操作。新鲜制备好的样品,建议尽量当天完成免疫沉淀等后续操作,但如果样品不能当天使用,也可以适当分装后-80℃冻存。2.Anti-V5免疫磁珠准备。由于Anti-V5磁珠储存在特殊保护液中,所以需要在加入样品前适当洗涤。a.用移液器轻轻吹打重悬Anti-V5磁珠,按照每500μl样品10μl或20μl磁珠悬浊液,取适量Anti-V5磁珠至一洁净离心管中,加入1X TBS TBS 至最终体积为约0.5ml。b.用移液器轻轻吹打并充分重悬Anti-V5磁珠。置于 磁力架(FMS004/ FMS008/ FMS012/ FMS016/ FMS024)上分离10秒,去除上清。重复上述步骤两次。c.按照初始体积的量,用1X TBSTBS 重悬Anti-V5磁珠。3.免疫沉淀(Immunoprecipitation, IP):a.加入磁珠与孵育。按照每500μl蛋白样品加入10μl或20μl磁珠悬浊液的比例加入Anti-V5磁珠,置于侧摆摇床或旋转混合仪上,室温孵育2小时或4℃孵育过夜。注:孵育过程中,如果磁珠发生聚团或呈片状属正常现象,不会影响实验结果。b.磁分离。孵育完毕后,置于磁力架上分离10秒,去除上清。注:可保留部分上清液,用于检测免疫沉淀的效果。c.洗涤。加入500μl的1X TBS,用移液器轻轻吹打重悬Anti-V5磁珠。置于磁力架上分离10秒,去除上清。重复洗涤三次。注:也可以通过检测洗涤得到的洗涤液的OD280来判断是否洗涤完全,若OD280大于0.05,应适当增加洗涤次数。4.洗脱:根据标签蛋白的特点及后续实验要求,可以选择如下3种方法之一进行洗脱。注:由于V5-tag与V5抗体的结合力非常强,V5多肽竞争洗脱和酸性洗脱的效果可能会不太理想,建议优先使用SDS-PAGE上样缓冲液洗脱法。a.SDS-PAGE上样缓冲液洗脱法:本方法为变性法,得到的蛋白样品适合SDS-PAGE电泳或WB检测。(a)SDS-PAGE上样缓冲液的配制:可以直接使用阿拉丁生产的P0015A SDS-PAGE蛋白上样缓冲液(1X),或使用阿拉丁生产的P0015 SDS-PAGE蛋白上样缓冲液(5X)或自行参考《分子克隆》等配制5X或2X的SDS-PAGE蛋白上样缓冲液,然后加入水配制成1X的SDS-PAGE蛋白上样缓冲液。通常SDS-PAGE蛋白上样缓冲液含有DTT等还原剂,其洗脱得到的蛋白样品中会含有V5抗体的轻链和重链。(b)每10-20μl原始磁珠体积的磁珠,加入100μl 1X SDS-PAGE上样缓冲液,95℃加热5分钟。(c)置于磁力架上分离10秒,取上清进行SDS-PAGE电泳或Western检测。b.V5多肽竞争洗脱法:本方法为非变性法,洗脱效率较低,但洗脱后的蛋白保持原有的生物活性,便于后续分析检测。(a)V5多肽洗脱液的配制:取适量V5多肽溶解于1X TBS中,使其终浓度为150μg/ml,或稀释5mg/ml的V5多肽溶液至150μg/ml。(b)每10-20μl原始磁珠体积,加入100μl V5多肽洗脱液(150μg/ml),混匀后置于侧摆摇床或旋转混合仪上,室温摇晃孵育30-60分钟,或4℃孵育1-2小时。为了提高洗脱效率,可延长孵育时间或重复洗脱。(c)孵育完毕后,置于磁力架上分离10秒,将上清转移到新的离心管中。上清即为洗脱的V5标签蛋白。(d)洗脱的V5标签蛋白置于4℃待用,或者-20℃或-80℃长期保存。注:由于V5-tag与V5抗体的结合力非常强,V5多肽竞争洗脱的效果可能会不太理想,此时需要对V5多肽浓度及竞争条件进行一定的优化。c.酸性洗脱法:本方法为非变性法,比较快速且高效。洗脱后的蛋白保持原有的生物活性,便于后续分析检测。(a)溶液的配制:酸性洗脱液(0.1M Glycine-HCl, pH3.0),中和液(0.5M Tris-HCl, pH7.4, 1.5M NaCl)。(b)每10-20μl原始磁珠体积,加入100μl酸性洗脱液,混匀后置于侧摆摇床或旋转混合仪上,室温孵育5分钟。注:孵育时间不宜超过15分钟。(c)孵育完毕后,置于磁力架上分离10秒,将上清转移到新的离心管中,并加入10μl中和液,适当混匀。(d)为了获得最大的洗脱效率,可重复步骤b和c,并将相同样品合并。(e)洗脱并中和的V5标签蛋白置于4℃待用,或者-20℃或-80℃长期保存。注1:由于V5-tag与V5抗体的结合力非常强,酸性洗脱法的效果可能低于SDS-PAGE上样缓冲液洗脱法。注2:由于目的蛋白的差异,酸性洗脱法的洗脱效率也会存在一定的差异。如果对洗脱效率的要求比较高,可对酸性洗脱液的pH值在2.5-3.1之间进行适当的调整,相应的中和液的pH值或量也要进行适当的调整,例如100μl酸性洗脱液(0.1M Glycine-HCl, pH2.8)和15μl中和液(1M Tris-HCl, pH8.5)。常见问题: Problem Possible Causes Solution Very few or no V5‐tagged protein exists in the eluate. Protein is not completely eluted. Change elution methods. No target protein expressed. Make sure the protein of interest contains the V5-tag by Western blot or dot blot analyses. Very low protein expression level. 1. Use larger volume of cell lysate. 2. Optimize expression conditions to raise the protein expression level. Washes are too stringent. Reduce the time and number of washes. Incubation times are inadequate. Increase the incubation time. Interfering substance is present in sample. Lysates containing high concentration of DTT, 2-mercaptoethanol, or other reducing agents may destroy antibody function, and must be avoided. Detection system is inadequate. If Western blot detection is used: 1. Check primary and secondary antibodies using proper controls to confirm binding and reactivity. 2. Verify that the transfer was adequate by using prestained protein marker or staining the membrane with Ponceau S. 3. Use fresh detection substrate or try a different detection system. Background is too high. Proteins bind nonspecifically to the Anti-V5 monoclonal antibody, insufficient washing on magnetic beads, or the microcentrifuge tubes. 1. Pre-clear lysate with Mouse IgG Magnetic Beads to remove nonspecific binding proteins. 2. After suspending beads for the final wash, transfer entire sample to a clean microcentrifuge tube before centrifugation. Washes are insufficient. 1. Increase the number of washes. 2. Prolong duration of the washes, incubating each wash for at least 15 minutes. 3. Increase the salt and/or detergent concentrations in the wash solutions. 4. Centrifuge at lower speed to avoid nonspecific trapping of denatured proteins. Multiple protein bands found in the eluate. The protein is not stable at room temperature. Purify the target protein at lower temperature, such as 4℃. Protein degradation due to proteases activity during purification process. Add protease inhibitors to cell lysate. Non‐specific binding. 1. Prepare cell lysate again. 2. Add additional wash steps.

Aladdin's UltraBio™ Anti-V5 Magnetic Beads are based on nano-scale amino magnetic beads covalently coupled with high-quality V5 mouse monoclonal antibody. This product can specifically bind to proteins containing V5 tags in animal, plant or microorganism lysates, serum, ascites, and is recommended for immunoprecipitation (IP), co-immunoprecipitation (Co-IP) or protein purification.V5-tag is a peptide consisting of 14 amino acids (GKPIPNPLLGLDST) originated from monkey parainfluenza virus V5. The nucleic acid sequence of V5-tag can be linked to the 5' end or 3' end of the target gene by recombinant technology to express V5-tagged target proteins. V5-tag has been widely used for protein expression, purification, identification, interaction and functional studies due to the following advantages


Precautions

This product should be maintained at a pH of 6-8. Do not centrifuge, dry or freeze the magnetic beads. Long time exposure of the beads to magnetic field will cause beads to agglomerate.This product should be properly resuspended in solution by gentle pipetting prior to use. Do not vortex to avoid the denaturation of the antibody.When performing immunoprecipitation, it is recommended to set up both positive and negative controls appropriately.Protein samples should be purified as soon as possible after collection and should always be placed at 4℃ or on ice to minimize protein degradation or denaturation. Protein degradation can also be inhibited by adding appropriate protease inhibitors, such as Protease Inhibitor Cocktail for General Use , Protease and Phosphatase Inhibitor Cocktail for General Use (MS-safe, 50X) , Protease Inhibitor Cocktail for Mammalian Cell and Tissue Extracts , Protease and Phosphatase Inhibitor Cocktail for Mammalian Cell and Tissue Extracts , etc. If using a vacuum pump to aspirate the supernatant, the strength of the vacuum pump should be controlled properly to avoid the aspiration of magnetic beads.The beads may agglomerate when eluted with acidic solutions, which is normal and does not affect the normal use of the beads. 0.1% non-ionic detergent (e.g., Triton X-100, Tween-20 or NP-40) is effective in preventing agglomeration and does not affect the antibody binding efficiency of the beads.High concentrations of DTT, mercaptoethanol, guanidine hydrochloride, etc. may have a certain effect on the binding of this product to tagged proteins, but Cell lysis buffer for Western and IP , RIPA Lysis Buffer or NP-40 Lysis Buffer etc. are fully applicable. For selection guide of different lysis buffers produced by , please refer to our website at: http://www.aladdin-e.com/support/lysis-buffer.htm.This product is for R&D only. Not for drug, household, or other uses.For your safety and health, please wear a lab coat and disposable gloves during the operation.


Instructions for Use

1.Preparation of protein samples:a.Choose an appropriate lysis buffer for preparing cell or tissue lysates, such as Protein A Magnetic Beads 1ml P2102-5ml Protein A Magnetic Beads 5ml P2105-1ml Protein G Magnetic Beads 1ml P2105-5ml Protein G Magnetic Beads 5ml P2108-1ml Protein A+G Magnetic Beads 1ml P2108-5ml Protein A+G Magnetic Beads 5ml P2115-0.5ml Anti-Flag Magnetic Beads 0.5ml P2115-2ml Anti-Flag Magnetic Beads 2ml P2118-0.5ml Anti-Myc Magnetic Beads 0.5ml P2118-2ml Anti-Myc Magnetic Beads 2ml P2121-0.5ml Anti-HA Magnetic Beads 0.5ml P2121-2ml Anti-HA Magnetic Beads 2ml P2135-0.5ml Anti-His Magnetic Beads 0.5ml P2135-2ml Anti-His Magnetic Beads 2ml P2151-200μl Streptavidin Magnetic Beads 200μl P2151-1ml Streptavidin Magnetic Beads 1ml P2151-5ml Streptavidin Magnetic Beads 5ml P2171-1ml Mouse IgG Magnetic Beads 1ml P2171-5ml Mouse IgG Magnetic Beads 5ml P2173-1ml Rabbit IgG Magnetic Beads 1ml P2173-5ml Rabbit IgG Magnetic Beads 5ml


储存与运输

储存温度 -20°C储存
运输条件 超低温冰袋运输
稳定性与储存 -20ºC保存,两年有效。4ºC保存,至少三个月内有效。

质检证书(CoA,COO,BSE/TSE 和分析图谱)

C of A & Other Certificates(BSE/TSE, COO):
输入批号以搜索分析图谱:

溶液计算器