Product Name | NFκB-p100(Phospho-Ser866) Antibody |
Host Species | Rabbit |
Clonality | Polyclonal |
Purification | Antibodies were produced by immunizing rabbits with synthetic phosphopeptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific phosphopeptide. Non-phospho specific antibodies were removed by chromatogramphy using non-phosphopeptide. |
Applications | WB IHC IF |
Reactivity | Hu Ms Rt |
Specificity | The antibody detects endogenous level of NFκB -p100 only when phosphorylated at serine 866. |
Immunogen | Peptide-KLH. Peptide sequence around phosphorylation site of serine 866(E-D-S(p)-A-Y) derived from Human NFκB-p100. |
Target Name | NFkB-p65 |
Alternative Name | p52; p105; H2TF1; LYT10; NF-kB2 |
Modification | Phospho-Ser866 |
SDS-PAGE MW | 120kd |
Accession No | Q00653; NP_001070962.1 |
Concentration | 1.0mg/ml |
Formulation | Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. |
Storage | Store at -20°C for long term preservation (recommended). Store at 4°C for a short term use. |
Application
Background
NF-kappa-B is a pleiotropic transcription factor present in almost all cell types and is the endpoint of a series of signal transduction events that are initiated by a vast array of stimuli related to many biological processes such as inflammation, immunity, differentiation, cell growth, tumorigenesis and apoptosis. NF-kappa-B is a homo- or heterodimeric complex formed by the Rel-like domain-containing proteins RELA/p65, RELB, NFKB1/p105, NFKB1/p50, REL and NFKB2/p52. The dimers bind at kappa-B sites in the DNA of their target genes and the individual dimers have distinct preferences for different kappa-B sites that they can bind with distinguishable affinity and specificity. Different dimer combinations act as transcriptional activators or repressors, respectively. NF-kappa-B is controlled by various mechanisms of post-translational modification and subcellular compartmentalization as well as by interactions with other cofactors or corepressors. NF-kappa-B complexes are held in the cytoplasm in an inactive state complexed with members of the NF-kappa-B inhibitor (I-kappa-B) family. In a conventional activation pathway, I-kappa-B is phosphorylated by I-kappa-B kinases (IKKs) in response to different activators, subsequently degraded thus liberating the active NF-kappa-B complex which translocates to the nucleus. In a non-canonical activation pathway, the MAP3K14-activated CHUK/IKKA homodimer phosphorylates NFKB2/p100 associated with RelB, inducing its proteolytic processing to NFKB2/p52 and the formation of NF-kappa-B RelB-p52 complexes. The NF-kappa-B heterodimeric RelB-p52 complex is a transcriptional activator. The NF-kappa-B p52-p52 homodimer is a transcriptional repressor. NFKB2 appears to have dual functions such as cytoplasmic retention of attached NF-kappa-B proteins by p100 and generation of p52 by a cotranslational processing. The proteasome-mediated process ensures the production of both p52 and p100 and preserves their independent function. p52 binds to the kappa-B consensus sequence 5′-GGRNNYYCC-3′, located in the enhancer region of genes involved in immune response and acute phase reactions. p52 and p100 are respectively the minor and major form; the processing of p100 being relatively poor. Isoform p49 is a subunit of the NF-kappa-B protein complex, which stimulates the HIV enhancer in synergy with p65.
Dobrzanski P., Ryseck R.P., Bravo R.EMBO J. 13:4608-4616(1994)
Beg A.A., Baldwin A.S. Jr.Oncogene 9:1487-1492(1994)
ebiomall.com
>
>
>
>
>
>
>
>
>
>
>
>
1．取出试剂盒室温平衡30min，取出血样放至室温。
2．配标准品：取150uL标准品加入150uL标准品稀释液稀释，依次稀释5次。
3．加样：分别于各反应孔中加入标准品50uL，样品40UL，标准品做复孔，样品做3孔。
4．分别于样品孔中加入10UL抗体。
5．标准品和样品孔中分别加入50uL链酶亲和素-HRP，盖上封板膜,轻轻震荡混匀，37℃温育60min。
6．配洗涤液：将30倍浓缩洗涤液用蒸馏水30倍稀释后备用。
7．洗涤：小心揭开封板膜，弃去液体，甩干，每孔加200uL洗涤液，静置30s后弃去，如此重复5次，拍干。
8．显色：每孔先加入显色剂A 50uL，再加显色剂B 50uL，轻轻震荡混匀，37℃避光显色6min。
9． 终止：每孔加入终止液50uL，终止反应（此时蓝色立即转为黄色）。
10．测定：以空白孔调零，450nm波长依序测量各孔的吸光度。测定应在加终止液10min之内进行。
11．保存结果，收拾桌面。
12．分析处理数据
注意事项
1. 取出板条前恢复到室温后再打开外包装袋，实验中不用的板条立即放回包装中，密闭封口，其余不用试剂应盖好。
2. 实验操作中请使用一次性的吸头，避免交叉污染。
3．实验板孔加入试剂的顺序应一致，以保证所有反应孔的孵育时间一致。
4．洗涤过程中反应孔中残留的洗涤液应在滤纸上充分拍干，勿将滤纸直接放入反应孔中吸水。
5．试剂盒内试剂请在保质期内使用，不同批号试剂不要混用。
6．1000pg/ml以上的结果为非线性的，根据此标准曲线无法得到精确的结果。大于1000pg/ml 的样品应以标准稀释缓冲液稀释后重做。在结果分析时，结合考虑相应的稀释度。
复习了很多文献在测定方法里面均提到了CV
例如：
Theintra-assaycoefficientofvariationfortheassaywas4-6%.
Theanalyticcoefficientofvariationwas10.2%
问题是：
我是否可以直接使用说明书里的CV值？
如果不可以，我该如何操作进行计算
ELISA的基础是抗原或抗体的固相化及抗原或抗体的酶标记。结合在固相载体表面的抗原或抗体仍保持其免疫学活性，酶标记的抗原或抗体既保留其免疫学活性，又保留酶的活性。在测定时，受检标本（测定其中的抗体或抗原）与固相载体表面的抗原或抗体起反应。用洗涤的方法使固相载体上形成的抗原抗体复合物与液体中的其他物质分开。再加入酶标记的抗原或抗体，也通过反应而结合在固相载体上。此时固相上的酶量与标本中受检物质的量呈一定的比例。加入酶反应的底物后，底物被酶催化成为有色产物，产物的量与标本中受检物质的量直接相关，故可根据呈色的深浅进行定性或定量分析。由于酶的催化效率很高，间接地放大了免疫反应的结果，使测定方法达到很高的敏感度。
DAS-ELISA试剂盒中抗体有包被抗体和酶标抗体，这两种抗体是一种抗体，前者没有酶标，后者用酶进行了标记。
NCM-ELISA一般有一抗和二抗，这两种抗体不一样，前者（一抗）一般是鼠抗体或兔抗体，没有酶标，相对应的二抗一般是羊抗鼠或羊抗兔抗体，用酶进行标记。也有用马大规模备抗体的。
TDS-ELISA是三抗体ELISA，第三级的抗体是将信号级联放大。
以上三种是比较常见的，还有其他一些试剂盒，可参考免疫学的内容。
