Bradford–ProteinDetermination
Bradford – Protein DeterminationIntroductionA rapid and accurate method for the estimation of protein concentration. The technique is simpler, faster than the Lowry method, and is subject to less interference. Bradford, M. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal. Biochem. (1976) 72, 248-254. The Coomassie blue G250 ......阅读全文
Determination－and－Detection－of－Reactive－Oxygen－Species－(ROS),－Lipid－...
Reactive oxygen species or intermediates are formed by the incomplete reduction of oxygen. Organisms living in aerobic environment generate variou
DNA－Immunoprecipitation－for－the－Determination－of－DNABinding－Specificity
Andrea J. Gossett and Jason D. Lieb1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA1Corresponding autho
Protein－Crystallization
Background:Proteins, like many molecules, can be prompted to form crystals when placed in the appropriate conditions. In order to crystallize a protei
Radioiodination－of－protein
Radioiodination (by Jun Takagi,6/16/2000)Purpose and backgroundsPrinciple of radioiodinationAddition of oxidizing reagents (such as chloramine-T or pe
Protein－Electrophoresis
DefinitionAmino acids, nucleotides, polypeptides, and other compounds in a colloidal state can be separated by the application of external voltages wh
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－purification;－actin
Protein purification; actin Overview ACTINThe most abundant muscle and non-muscle cytoskeletal protein. MW 42 kDa, 374/375 amino acids; various
Protein－Kinase－A－at－the－Centrosome
Protein kinase A regulatory subunit RIIalpha (PKA-RIIa) is tightly bound to centrosomal structures during interphase through interaction with the A-ki
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
Preparing－a－Selenomethionyl－Protein
PurposeThe protocol describes how to prepare selenomethionyl (Se-Met) protein using a regular E.coli strain. Selenium can be used for phase determinat
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
Protein－A－Purification－of－Antibody
1. Reagents(1) Affi-gel Protein-A Agarose (BioRad #153-6153)(2) MAPS II Binding Buffer (BioRad # 153-6161)(3) 0.314 g/ml diH2O(4) MAPS II Elution Buff
Protein－Assay－(Spectrophotometer)
Protein Assay (Spectrophotometer)Use BSA (bovine serum albumin) 1mg/ml stock solution (1ml Eppendorf tubes) for standard curve.Place 0, 2, 5, 10, 15,
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
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
Protein－Expression－and－Purification－Protocol
Step 1: Transform appropriate DNA plasmid into BL21(DE3) E. coli cells. These cells must be competent. (Protocol for how to make competent cells.)a) T
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
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
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
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
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
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
Coupling－Antibodies－to－Protein－A－or－G
1. use 2 mg of antibody per ml wet beads (use appropriate antibody/protein A or G combination).2. mix antibodies with beads and bind at room temperatu
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 (
In－Vitro－Protein－Ubiquitination－Assay
Ubiquitination is one of the most important posttranslational modifications in all eukaryote organisms. Ubiquitin-activating enzyme (E1), ubiquiti
Protein－G－Purification－of－Antibodies
1. Reagent and Materials(1) Hi-Trap Protein G Column (Pharmacia Biotech #17-0404-01)(2) 20 mM Sodium Phosphate Buffer, pH 7.01.084 g NaH2PO4, anhydrou
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
bradford法和lowry法是什么法
bradford和lowry两者都是生物检验的化学试剂。 bradford法，也称考马斯蓝染色法（coomassie blue staining）。考马斯亮蓝G-250测定蛋白质含量属于染料结合法的一种。考马斯亮蓝G-250在游离态下呈红色，当它与蛋白质的疏水区结合后变为青色，前者最大光吸收在
Bradford法蛋白质含量的测定
原理：这一方法基于考马斯亮蓝G-250 有红蓝两种不同的形式。在一定浓度的乙醇及酸性条件下，可配成淡红色的溶液，当与蛋白质结合后，产生蓝色化合物，反应迅速而稳定。反应化合物在 465-595nm处有最大的光吸收值，化合物颜色的深浅与蛋白浓度的高低成正比关系，因此可检测595nm的光吸收值的大
蛋白质含量测定实验——Bradford法
蛋白质含量测定实验可以用于：（1）测定蛋白质浓度；（2）检测所提取的蛋白质含量。实验材料蛋白质试剂、试剂盒牛血清NaCl考马斯亮蓝仪器、耗材分光光度计离心机实验步骤1. 分别在两组微量离心管中各加入0.5 mg/ml 牛血清白蛋白，以 0.15 mmol/l NaCl补足至100 ul，同时以两管