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Immunoprecipitation of GST-Tag from 300 µg extracts of 293F cells transfected with a MYOD1 expression vector containing a single N-terminal GST-Tag was performed using 20 µl of Magnetic Beads-conjugated Rabbit anti GST-Tag mAb (AE122). Magnetic Beads-conjugated Rabbit IgG isotype control(AC047) was used to precipitate the Control IgG sample. IP samples were eluted with 1X Laemmli Buffer. The Input lane represents 10 % of the total input. Western blot analysis of immunoprecipitates was conducted using Rabbit anti GST-Tag mAb (AE077) at a dilution of 1:2000.
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Glutathione S-transferases (GSTs), previously known as ligandins, comprise a family of eukaryotic and prokaryotic phase II metabolic isozymes best known for their ability to catalyze the conjugation of the reduced form of glutathione (GSH) to xenobiotic substrates for the purpose of detoxification. The GST family consists of three superfamilies: the cytosolic, mitochondrial, and microsomal—also known as MAPEG—proteins. Members of the GST superfamily are extremely diverse in amino acid sequence, and a large fraction of the sequences deposited in public databases are of unknown function. The Enzyme Function Initiative (EFI) is using GSTs as a model superfamily to identify new GST functions.A GST-tag is often used to separate and purify proteins that contain the GST-fusion protein. The tag is 220 amino acids (roughly 26 KDa) in size, which, compared to tags such as the Myc-tag or the FLAG-tag, is quite large. It can be fused to either the N-terminus or C-terminus of a protein. However, many commercially available sources of GST-tagged plasmids include a thrombin domain for cleavage of the GST tag during protein purification.
首先，一般抗体不推荐客户回收利用，抗体使用之后缓冲体系已经发生改变，不同客户在回收抗体的保存条件上也会有差异，所以抗体回收使用效果无法保证。另外，ABclonal公司也做过一批抗体回收验证测试，测试结果显示不同抗体可回收次数不同，一般效价越高的抗体，可重复使用的次数越多，客户可根据实验情况来确定。
注：我们将孵育完毕后剩余的抗体回收到离心管中置于4℃保存，效价高的抗体可至少保存1周，至少重复利用3次。
武汉爱博泰克生物（ABclonal）科技有限公司是国产品牌，她成立于2011年，公司依托ABclonal美国波士顿抗体与蛋白研发中心、中国光谷生物城(武汉)抗体生产基地以及上海张江分子酶研发中心，凝聚了十余位来自哈佛大学、麻省理工、复旦大学、上海交大、中科院生化细胞所和武汉大学的全球知名分子和免疫学方面博士，组成我们的科学家团队，通过聚焦抗体与酶核心技术，致力于打破国际技术的垄断，将公司打造成为科研工具和诊断原料的国内领导品牌，乃至弯道超越国际巨头。 我们拥有包括兔多克隆抗体、小鼠单克隆抗体、兔单克隆抗体的生产研发平台，同时也有包括WB,IHC,IF,IP,CHIP在内的检测平台，我们对每一支自产的抗体进行了严格的检测。当然，我们部分直销地区也可以帮客户代购进口品牌的产品。同时也有抗体定制服务。ABclonal抗体优势：1，严自检，保质量；2产品多，指标全；3，价格低，货期短。注：ABclonal抗体价格体系详情见附件
ABclonal抗体成分在平时工作当中，常会有客户咨询我们的抗体用的什么buffer进行保存，一般来说，我们的buffer的成分是：PBS含0.03%的proclin300、0.05%牛血清白蛋白、50%甘油；也有一些是PBS含0.03%的proclin300，50%甘油。防腐剂 Proclin 300活性成分主要是2-甲基-4-异噻唑啉-3-酮（MCI）和5-氯-2-甲基-4-异噻唑啉-3-酮（CMCI）。ProClin生物灭活剂能够迅速穿透细胞膜，抑制对细胞呼吸至关重要的特定酶，因此一接触微生物有机体就会立即抑制细胞活性。ProClin的多个特定毒性位点可以防止微生物产生高水平的耐药性。
