CyanogenBromidedigestionofprotein
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 the hood. Extremely toxic!3. Dissolve a small amount of CNBr in 70% TFA, the exact amount is not critical. One or two crystals should be fine, although weighing this reagent is NOT recommended. Place the utensil used in dilute bleach to neutralize the residual CNBr.4. Red......阅读全文
Platelet－Amyloid－Precursor－Protein－Pathway
The amyloid -beta peptide (Ab), a proteolytic fragment of amyloid precursor protein (APP), is the major componenet of senile plaques, the hallmark of
Protein－concentration－of－Laemmli－gel－samples
Protein concentration of Laemmli gel samplesTo 10 µl boiled lysate (in Laemmli sample buffer) add 40µl water + 50µl 50% TCA. Ppt. 10 min. on ice. Spin
COMPARISION－OF－DIFFERENT－PROTEIN－DETERMINATION－METHODS
COMPARISION OF DIFFERENT PROTEIN DETERMINATION METHODSCompanyMethodDetection RangeApplications -CompatibilityAssay protocolPrecautions-InterferencesA
蛋白质（protein）概述
蛋白质是一种复杂的有机化合物，旧称“朊”。蛋白质这一概念最早是由瑞典化学家永斯·贝采利乌斯于1838年提出，但当时人们对于蛋白质在机体中的核心作用并不了解。1926年，詹姆斯·B·萨姆纳揭示尿素酶是蛋白质，首次证明了酶是蛋白质。第一个被测序的抗原肽蛋白质是胰岛素，由弗雷德里克·桑格完成，他也因此获得
重组DNA的分离、克隆与测序实验手册2
C. Restriction digestionRestriction enzyme digestions are performed by incubating double-stranded DNA molecules with an appropriate amount of restrict
Basic－procedures－for－bacteria－culture1
A. Phenol extraction of DNA samplesPhenol extraction is a common technique used to purify a DNA sample (1). Typically, an equal volume of TE-saturated
RNA实验方法3
Part III: HybridizationTurn heatblock on to 95C.For samples in water or ethanol, dry down appropriate amount of RNA, and include a tube with 1ul of tR
General－Cloning－Protocols
Large Scale Preps: (See Large scale plsasmid prep protocol for more details) Cultures: Inoculate a 5 mL LB/Amp (50 - 100 µg/mL) culture in early a
核酸纯度、浓度与分子量测定实验——Ethidium－bromide染色法
实验方法原理利用一系列不同浓度的DNA标准溶液（0、2.5、5、10、20、30、40、50 ng/ml），或已知浓度的DNA marker，和未知浓度DNA样品一起进行琼脂糖凝胶电泳，以EB染色后，在凝胶图象分析仪上观察，比较标准浓度及未知浓度的亮度，来求取DNA 的含量；比较DNA样品与DNA
Total－Protein－Extraction－with－TCAAcetone
We describe a procedure allowing extraction of total proteins that performs efficiently with a large variety of plant tissues, based on simultane
Protein－extraction－from－whole－tissues－for－IEF
Modified from that of Jay Thelen - University of Missouri-Columbia Phenol extraction followed by methanolic ammonium acetate precipitation - an effe
Eccles:Protein－Lysates－from－Cells－in－Culture
Cell Lysis Buffer 5mL 0.1M Tris HCl pH 8 (10mM) 0.44g NaCl (150mM) 0.02g EDTA (1mM) 0.5mL nonidet P40 (1% w/v) 0.05g SDS (0.1% w/v) Make up to 50mL
Size－and－Shape－of－Protein－Molecules2
The sedimentation coefficient of a protein is a measure of how fast it moves through the gradient. Increasing the mass of the protein will increase i
Size－and－Shape－of－Protein－Molecules5
Hydrodynamic Analysis and EM Applied to Large Multisubunit Complexes The text box above showed the application of the Siegel–Monte analysis to SMC p
Size－and－Shape－of－Protein－Molecules5
Hydrodynamic Analysis and EM Applied to Large Multisubunit Complexes The text box above showed the application of the Siegel–Monte analysis to SMC p
Thrombin－Cleavage－of－GSTFusion－protein
INTRODUCTIONIn many cases the cleavage can be performed using the free intact fusion, or in same cases with the fusion protein bound to a matrix. The
Size－and－Shape－of－Protein－Molecules1
Size and Shape of Protein Molecules at the Nanometer Level Determined by Sedimentation, Gel Filtration, and Electron MicroscopyAn important part of ch
troponin蛋白纯化－Protein－purification:－troponins
Overview TROPONINS The calcium-dependent regulatory protein complex located on the thin actin filaments of muscle comprises of TnC (17.8 kDa), TnI (2
Purification－of－Antiserum－or－Ascites－by－Protein－A/G－Chromatography
1、Required Materials and Equipment(1) Protein A or G agarose gel column (10 ml or 5 ml of packed beads; see guidelines below for choice of protein A o
Size－and－Shape－of－Protein－Molecules4
Determining the Molecular Weight of a Protein Molecule—Combining S and R s à la Siegel and MonteWith the completion of multiple genomes and increasing
蛋白质抽取(protein－extraction)
蛋白质在细菌中表现后，以反复的冷冻-解冻方法打破细胞，再用硫酸铵把蛋白质沉淀下来，此步骤可以去除大部份核酸、多醣、脂质等杂物。仪器用具：恒温震荡培养箱37℃；高速冷冻离心机及离心管 （使用20,000 rpm离心陀）使用高速离心机要注意： 离心机及离心陀的温度要预冷完全，相对位置的两只离心管要平衡好
Size－and－Shape－of－Protein－Molecules3
The Kirkwood/Bloomfield CalculationThe understanding of how protein shape affects hydrodynamics is elegantly extended by an analysis originally develo
UV－Absorbance－(280－nm)－－–－Protein－Determination
UV Absorbance (280 nm) – Protein Determination Simple and quick method to accurately quantitate total protein in purified material or approximately q
蛋白浓缩(protein－concentration)方法详解
1，透析袋浓缩法利用透析袋浓缩蛋白质溶液是应用最广的一种。将要浓缩的蛋白溶液放入透析袋（无透析袋可用玻璃纸代替），结扎，把高分子（6000－12000）聚合物如聚乙二醇（碳蜡）、聚乙烯吡咯、烷酮等或蔗糖撒在透析袋外即可。也可将吸水剂配成30%－40%浓度的溶液，将装有蛋白液的透析袋放入即可。吸水剂用
Protein－L树脂填料应用说明
Protein L也是一种免疫球蛋白结合蛋白，来源于从消化链球菌马格努斯。不同于Protein A和Protein G，Protein L结合的是抗体分子的轻链。由于没有重链的参与，比起Protein A和Protein G，Protein L可以结合更多种类型的抗体。Protein L可以
蛋白浓缩（protein－concentration）基本方法
蛋白浓缩方法基本有：丙酮沉淀法；免疫沉淀法；三氯醋酸沉淀法；硫酸铵沉淀法；（低温）有机溶剂沉淀法；聚乙二醇沉淀法；超滤法；透析法；离子交换层析和冷冻干燥法…… 1.丙酮沉淀法；三氯醋酸沉淀法 试验要求的仪器简单，但是常常导致蛋白质变性。 2.免疫沉淀法：得有特异性抗体！ 3.硫酸铵沉淀法
Genomic－Libraries
Genomic DNA libraries Size of some genomes and chromosomes:Comparative Sequence Sizes(Bases)(yeast chromosome 3)350 ThousandEscherichia coli (bacteriu
Genomic－DNA－Extraction－－PureLink™
实验概要The PureLink™ Genomic DNA Purification Kit allows rapid and efficient purification of genomic DNA. The kit is designed to efficiently isolate g
Double－Digestion(双酶切反应)时Universal－Buffer(通用缓冲液)的...
Double Digestion(双酶切反应)时Universal Buffer(通用缓冲液)的使用表■ 说明使用二种酶同时进行DNA切断反应 (Double Digestion) 时，为了节省反应时间，通常希望在同一反应体系内进行。TaKaRa采用Universal Buffer表示系统，
E.Z.N.A.®－Total－RNA－Midi－Kit－Protocol－DNase－I－digestion－Protocol
实验概要E.Z.N.A.® Total RNA Midiprep Kit provides a rapid and easy method for the isolation of up to 600 ug of total RNA from cultured eukaryotic cells,