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
Double－Digestion(双酶切反应)时Universal－Buffer(通用缓冲液)的...
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，并对每种酶表示了在各Universal Buffer中的相对活性。尽管如此，在进行Double Dig
丙烯酰胺胶中肽提取和蛋白消化技术
Digestion of Proteins and Extraction of Peptides from an Acrylamide GelSherry Niessen, Ian McLeod and John R. Yates IIIDepartment of Cell Biology, The
Studying－Arabidopsis－Envelope－Protein－Localization－and－Topology－Using－...
Chloroplasts are metabolically important organelles that perform many essential functions within plant cells. The chloroplasts can be subdivided
Overview－of－telomerase－protein－component－gene－hTert－Transcriptional
Telomerase is an enzyme which replicates the terminal sequences of eukaryotic chromosomes, namely the telomeres. Cells which
Signaling－Pathway－from－GProtein－Families
G-aS-coupled receptors stimulate adenylyl cyclase (AC), which synthesizes cAMP from ATP. In contrast Gai-coupled receptor
Use－of－the－Bradford－Protein－Assay－in－a－Microtiter－Plate－Format
Introduction The Bradford protein assay is a simple procedure for determination of protein concentrations in solutions that depends upon the change
Green－Fluorescent－Protein－as－an－Indicator－ofTransfection－in－Chicken－Embryos
Green fluorescent protein (GFP) is responsible for the bioluminescence of the Pacific Northwest jellyfish, Aequorea victoria. In A.victoria, the 27-kD
Activation－of－Src－by－Proteintyrosine－phosphatase－alpha
Progression through the cell cycle is accompanied by activation of the proto-oncogene c-Src, a protein tyrosine kinase. Overexpression of Src leads to
GProtein－Signaling－Through－Tubby－Proteins
The tubby gene product is expressed in the brain and has been implicated by mouse genetics in obesity and other disorders such as blindness. Structura
Purification－of－Kar3－Motor－Domain－Protein
Purification of Kar3 Motor Domain ProteinMaterialsInduced cells (2 - 5 g pellet of pET/Kar3 in BL31(DE3)pLysS host cells) (See note #1)HEM buffer =10
Activation－of－PKC－through－G－protein－coupled－receptor
G-protein coupled receptors (GPCRs) transduce a variety of signals from the extracellular environment across the plasma membrane. One of the common si
Fusion－Protein－Isolation(融合蛋白分离纯化)
Peter Novick Lab,Department of Cell Biology Yale University School of Medicinehttp://info.med.yale.edu/cellbio/Novick/Second/Protocols/Fusion.pdf1.Sta
Activation－of－cAMPdependent－protein－kinase,－PKA
G-protein coupled receptors (GPCRs) are one of the largest gene families of signaling proteins. Residing in the plasma membrane with seven transmembra
Factor－Xa－Cleavage－of－MBPFusion－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
蛋白产物（protein－products）的检测实验
一、组织蛋白的裂解提取：1.分别取-70℃保存的各组动物的样品（半个脑、0.5g肌肉），放入小离心管中，在冰浴上以PBS充分洗涤2次，除去残留血液。2.用无菌手术剪和镊子将大鼠肌肉剪碎（脑样品不用剪碎），放入另一小离心管中，于0℃以 PBS充分洗涤，4℃，3000 rpm离心5分钟。3.吸出上清夜，
Bradford法蛋白定量（Bradford－Protein－Assay－）
Bradford Assay is a rapid and accurate method commonly used to determine the total protein concentration of a sample. The assay is based on the observ
Protein－A－－G亲和层析的原理
对于IgG的纯化，大部分情况下我们都会选择使用Protein A或Protein G进行亲和层析。因为它们对于IgG的Fc段具有特异性的亲和作用，而对于其他杂蛋白没有或者只有很弱的结合。通常，仅仅凭借Protein A或Protein G一步亲和层析就可使蛋白纯度达到≥90%。
用RNase－III制备siRNA库来诱发RNAi(2)
Figure 1. Silencing Gene Targets by RNase III Derived siRNA Cocktails. A 200 bp dsRNA (15 µg) for each gene of interest was digested with 2.5 U RN
Purification－of－MBP－(maLTosebinding－proteins)－Fused－Proteins
Express fusion proteins as per the GST-fused protocol up to Step 7 (Day 3). All steps in protein purification should be done at 4° C unless otherwise
Isolation－of－rodent－pancreatic－β－cells
1. Adult rats weighing 250-350g were anesthetized, sacrificed and immediately used for pancreas sampling.2. Rat islets were isolated from male wistar
Facts－and－trouble－shooting
10 Fun Facts for DNA Electrophoresis ::Migration of DNA is retarded and band distortion can occur when too much buffer covers the gel. The sl
Construction－of－BAC－Libraries：Construction－of－a－BAC－library
Once high molecular weight (HMW) DNA has been prepared it must somehow be fragmented and DNA in the desired size range isolated. In general, as the de
Construction－of－BAC－Libraries：Megabase－DNA－Isolation
Megabase DNA IsolationMegabase-size DNA isolation from plantsTo construct large insert DNA libraries in BAC and YAC vectors, methods must be developed
SI基因编码的功能和结构描述
该基因编码一种在肠道刷缘表达的蔗糖酶-异麦芽糖酶编码蛋白被合成为前体蛋白，被胰腺蛋白酶切割成蔗糖酶和异麦芽糖酶两个酶亚单位。这两个亚基异源二聚形成蔗糖异麦芽糖酶复合物。这种复合物对于消化包括淀粉、蔗糖和异麦芽糖在内的膳食碳水化合物是必不可少的。该基因突变是先天性蔗糖酶-异麦芽糖酶缺乏症的原因。Thi
SI基因突变因子与药物介绍
该基因编码一种在肠道刷缘表达的蔗糖酶-异麦芽糖酶编码蛋白被合成为前体蛋白，被胰腺蛋白酶切割成蔗糖酶和异麦芽糖酶两个酶亚单位。这两个亚基异源二聚形成蔗糖异麦芽糖酶复合物。这种复合物对于消化包括淀粉、蔗糖和异麦芽糖在内的膳食碳水化合物是必不可少的。该基因突变是先天性蔗糖酶-异麦芽糖酶缺乏症的原因。[由R
Mapping－Protein－Distributions－on－Polytene－Chromosomes－by－Immunostaining2
12. Hold the salivary glands at the common duct with tweezers.Transfer the glands to a drop of fixing solution on a siliconizedcoverslip. 13.
Analysis－of－total－E.－coli－protein－by－SDS－PAGE
1. In microfuge tubes, spin down 0.1 ml of uninduced cells grown to near saturation or 0.15 ml of IPTG induced cells. Remove YT (or LB) media with a p
Ca++/－Calmodulindependent－Protein－Kinase－Activation
The calcium/calmodulin-dependent kinases (CaMKs) are involved in a large number of cellular responses induced by hormones, neurotransmitters and other
Mapping－Protein－Distributions－on－Polytene－Chromosomes－by－Immunostaining1
INTRODUCTIONThe formidable size and structure of polytene chromosomes allowmapping of chromosomal protein distributions at very high resolution.This p
酵母表达外源蛋白（foreign－protein）（5）
或者第5步和第6步改为丙酮洗:5.加入200ul冰冷的丙酮，用手指轻弹EP管，洗去管底和管壁残余的TCA。6.15000g,离心10－20分钟,倒掉上清，将EP管倒扣在吸水纸上轻轻控几下，除去残余在管口的液体。样品是酵母细胞超声后离心获得的上清，用Loading buffer溶解蛋白沉淀，始终不