AntibodyPurificationusingProteinA,ProteinG,orProteinLAgarose
实验概要This protocol is designed as a quick purification method for antibodies from mammalian sera, ascites, and cell culture supernatants. It should be noted that if the starting material is serum or ascites the final preparation will contain endogenous host IgG as well as specific antibodies. In general, the presence of this endogenous IgG should not interfere with assays using the antibodies. The immunogl......阅读全文
Eukaryotic－protein－translation
The scanning translation initiation model suggests that 40S ribosomal subunit preloaded with factors bind to the 5’ end of the mRNA near the cap. The
BIURET－PROTEIN－ASSAY
BIURET PROTEIN ASSAYMATERIALSBiuret ReagentBovine serum albumin (BSA)Spectrophotometer and tubesPROCEDUREPrepare standard dilutions of BSA containing
Protein－arginine－methylation
Typical modification sites: RGG box or RXR sequence motifs R-arginine, G-glycine,X-any aminoacid.Enzymes catalysing protein arginine methylation: PRMT
Lowry－–－Protein－Determination
Lowry – Protein Determination(From Protein Protocols on CD-ROM Humana Press, 1998 - Section 1-2 The Lowry Method for Protein Quantitation Jakob H. Wat
Acetone－precipitation－of－protein
This procedure is suitable for recovering proteins from most aqueous solvents and from SDS containing buffers. It is not recommended for proteins diss
LOWRY－PROTEIN－ASSAY
The Lowry procedure is one of the most venerable and widely-used protein assays, being first described in 1951 [Lowry et al., J. Biol. Chem. 193: 265-
Protein－Staining－Procedures
This method was successful in our lab using prostate tissue and for our specific objectives. Investigators must be aware that they will need to tailor
Bradford－protein－assay
Bradford protein assayConsiderations for useThe Bradford assay is very fast and uses about the same amount of protein as the Lowry assay. It is fairly
protein－G－适合纯化什么类型的蛋白
protein G 是一种细菌的外膜蛋白，可以特异性地和多种来源的IgG抗体相结合，因此是纯化抗体常用的一种蛋白质分子。它的野生型有多个抗体Fc位置的结合结构域，可以和多个IgG分子相结合，但最为常用的是改造后重组表达的Protein G， 具有2-5个结合结构域。这一个蛋白非常稳定，纯化以及保存操
Crosslinking－chromatin－immunoprecipitation－(XChIP)－protocol
实验概要ChIP is a powerful tool that allows the specific identification of proteins or histone modifications to regions of the genome. Chromatin is isol
蛋白质翻译后修饰的验证问题
Why are proteins, detected by mass spectrometry, not validated by site-specific antibodies?The modified motif could be detected by mass spectrometry (
Protein－G树脂填料磁珠特点与优势
Protein G是在C组和G组链球菌细菌中表达的免疫球蛋白结合蛋白，虽然与Protein A非常类似，但具有不同的结合特异性。它是65kDa（G148蛋白G）和58kDa（C40蛋白G）细胞表面蛋白，通过与Fab和Fc区的结合来纯化抗体。天然分子Protein G还能结合白蛋白，但由于血清
Basic－Protein－Chemistry－Techniques
Coomassie Blue Stain: (for gels) 1) Combine 225 ml Methanol with 225 ml ddH2O. 2) Add 0.5 grams of Coomassie Blue. 3) Just before use, add 50 ml acet
Basic－Protein－Chemistry－Techniques
实验概要Basic Protein Chemistry Techniques实验步骤Coomassie Blue Stain: (for gels) 1) Combine 225 ml Methanol with 225 ml ddH2O. 2) Add 0.5 grams of Coomassi
Cyanogen－Bromide－digestion－of－protein
1. Proteins are TCA precipitated and washed with acetone, then dried.2. The CNBr should be brought to room temperature in the hood and used ONLY in th
Bradford－Protein－Concentration－Assay
Bradford Protein Concentration Assayversion 01/07/2001Abbreviations:mcg = microgramsmcL = microlitersBSA = bovine serum albuminO.D. = optical densityd
Protein－Immunolocalization－in－Maize－Tissues
The analysis of gene expression at transcript and at protein level is of outstanding importance in plant developmental biology. Proteins can be loc
Mechanism－of－Protein－Import－into－the－Nucleus
Nuclear pore complexes (NPCs) are large proteinaceous assemblies that provide the only known portals for exchanging macromolecules between the nucleus
Western－Blot－with－Platelet－Protein
OUTLINEWestern blot is a wide used technique to identify a target protein/s for the certain antibody.PROTOCOLPrepare platelets.Lyse washed platelets (
Biorad－Protein－Assay:－Bradford
Biorad Protein Assay: BradfordStandards: 1 mg/ml BSA stock- dilute 1:10 to get 0.1 mg/ml BSAAdd To get H-2O20 µl 2 µg/ml 780 µl40 µl 4 µg/ml 760 µl60
Protocol－for－Protein－Extraction－for－proteomics
Protocol for Protein Extraction10 % w/v TCA/ acetone/ 0.07 % v/v -MercaptoethanolPlant cells are rich in compounds that interfere with the 2DE separat
Angiotensin－Protein－Kinase－Assay
James Hardwick's angiotensin assay protocolThis specific procedure was developed to assay the activity of the Lck kinase expressed from a retrovir
In－Vitro－Protein－Ubiquitination－Assay
Ubiquitination is one of the most important posttranslational modifications in all eukaryote organisms. Ubiquitin-activating enzyme (E1), ubiquiti
GST融合蛋白（GST－fusion－protein－purification）的表达与纯化
原理GST 纯化系统是利用GST （glutathione-S-transferase ）融合蛋白与固定的谷胱甘肽（GSH）通过硫键共价亲和，通过GSH交换洗脱的原理来进行纯化 。1ml树脂大约可结合5-8 mg融合蛋白，并可反复使用数次。试剂u IPTG（异丙基硫代-β-D-半乳糖苷） 2
Immunoprecipitation...－（二）
3. ImmunoprecipitationImmunoprecipitation can be performed using antibodies by different methods. The use of these methods is based on the requiremen
ChIP－using－plant－samples
实验概要 The immunoprecipitation (IP) of cross-linked chromatin with antibodies specific for certain histone modifications (chromatin immunoprecipitati
Immunoprecipitation
Immunoprecipitation (IP) is one of the most widely used immunochemical techniques. Immunoprecipitation followed by SDS-PAGE and immunoblotting, is rou
Doubletag在蛋白纯化(Protein－Purification)过程中的应用
Protein表达是一个非常复杂的过程，因此很难预测表达的蛋白是否是可溶性的、包涵体形式还是部分降解的。为了预防各种可能的困难条件，在重组蛋白上导入两种Tag可以提供获得高纯度均质蛋白的灵活性。 蛋白含有两种不同亲和纯化Tag的重要原因： 纯化全长的蛋白 获得最高纯化的蛋白 适合变性
Immunoprecipitation
实验概要In the IP method, the protein from the cell or tissue homogenate is precipitated in an appropriate lysis buffer by means of an immune complex
Bacic－Immunoprecipitation
实验概要 Immunoprecipitation (IP) is one of the most widely used immunochemical techniques. Immunoprecipitation followed by SDS-PAGE and immunoblotting,