TheRestrictionEnzymeDatabase
REBASE The Restriction Enzyme Database The Restriction Enzyme data BASE A collection of information about restriction enzymes and related proteins. It contains published and unpublished references, recognition and cleavage sites, isoschizomers, commercial availability, methylation sensitivity, crystal and sequence data. DNA methyltransferases, homing endonucleases, nicking enzymes, speci......阅读全文
The－Restriction－Enzyme－Database
REBASE The Restriction Enzyme Database The Restriction Enzyme data BASE A collection of information about restriction enzymes and related proteins. It
Restriction－Enzyme－Buffer
Restriction Enzyme Buffer Most enzymes can use REact buffers; however, some are made up separately. Use fresh Milli-Q water, siliconized or sterile gl
Restriction－Enzyme－Digestion－of－DNA
Materials:10X restriction enzyme buffer (see manufacturer's recommendation)DNAsterile waterrestriction enzymephenol:chloroform (1:1)Add the follow
限制性内切酶（restriction－enzyme）酶谱分析
一、实验目的在DNA上以限制性内切酶的酶切位点作为标记所绘制的物理图谱就是限制性内切酶图谱，限制性内切酶图谱与其他相关资料联合使用，可用于基因克隆、分离和基因功能研究。二、实验原理（一）酶切图谱的构建限制性内切酶在DNA上有特异的识别和切割位点，可将DNA切开而得到两个或两个以上的大小不同的片段，这
DNA分子的限制性内切酶（Restriction－enzyme－,－endonuclease）消...
限制性内切酶可特异地结合于一段被称为限制酶识别序列的DNA 序列位点上并在此切割双链DNA 。绝大多数限制性内切酶识别长度为4、5或6个核苷酸且呈二重对称的特异序列，切割位点相对于二重对称轴的位置因酶而异。一些酶恰在对称轴处同时切割 DNA 双链而产生带平端的DNA 片段，另一些酶则在对称轴
codon－usage－database
AnnouncementCodon Usage Database is an extended WWW version of CUTG (Codon Usage Tabulated from GenBank). The frequency of codon use in each organism
Restriction－digestion
Restriction digestionRestriction enzyme digestions are performed by incubating double-stranded DNA molecules with an appropriate amount of restriction
Restriction－Digest
Materials:Restriction enzymes of choice, such as BamH1 and EcoRIRestriction enzyme reaction buffer, such as MULTI-CORE (TM) (Promega)70 % Ethanol100 %
Enzyme－Kinetics－assay－of－the－WT
To assay 17 b-HSD activity in lysates, cells were harvested 48h after transfection using PBS Enzyme Free Cell Dissociation Solution ( specialty Media
ELISPOT－(Enzymelinked－ImmunoSPOT)
IntroductionEnzyme-linked immunosorbent spot (ELISPOT) assays were originally developed to enumerate B cells secreting antigen-specific antibodies, bu
常见限制性内切酶识别序列(酶切位点)
常见限制性内切酶识别序列(酶切位点)（BamHI、EcoRI、HindIII、NdeI、XhoI等）在分子克隆实验中，限制性内切酶是必不可少的工具酶。无论是构建克隆载体还是表达载体，要根据载体选择合适的内切酶（当然，使用T载就不必考虑了）。先将引物设计好，然后添加酶切识别序列到引物5' 端。
常见限制性内切酶识别序列(酶切位点)
常见限制性内切酶识别序列(酶切位点)（BamHI、EcoRI、HindIII、NdeI、XhoI等）在分子克隆实验中，限制性内切酶是必不可少的工具酶。无论是构建克隆载体还是表达载体，要根据载体选择合适的内切酶（当然，使用T载就不必考虑了）。先将引物设计好，然后添加酶切识别序列到引物5' 端。
Phosphatasing－with－Shrimp－Alkaline－Phosphatase－(S.A.P.)
Phosphatasing with Shrimp Alkaline Phosphatase (S.A.P.)Use to prevent linearized vector plasmid from recircularizing.The phosphatase from shrimp is ea
Restriction－Digests－of－High－Molecular－Weight－Yeast－DNA
Purpose:To perform restriction digests of YACs for mapping using rare cutting enzymes or more conventional restriction endonuclease digestion.Time req
Methods－for－the－Measurement－of－a－Bacterial－Enzyme－Activity－in－Cell－Lysates
AbstractThe kinetic characteristics and regulation of aspartate carbamoyltransferase activity were studied in lysates and cell extracts of Helicobacte
Steady－State－ATPase－Assays－Coupled－Enzyme－System
MaterialsTubulin (>5 mg/mL)100 mM Mg·GTP4 mM Taxol in DMSOPM =100 mM PIPES pH 6.82 mM EGTA1 mM Mg2SO4Motor protein (>95% purity; 15-20 µM)Cuvettes (20
凝乳酶（curdling－enzyme）的提取纯化
一、实验目的通过发酵液中凝乳酶的提取纯化，了解酶提取纯化的方法，学习凝胶层析法的工作原理和基本操作技术。二、实验原理凝乳酶是一种酸性蛋白酶，其主要的生物学功能是有限剪切Phe105- Met106连接的κ-酪蛋白，导致牛奶凝结，从而被广泛应用干酪生产中。有机溶剂对于许多蛋白质（酶）、核酸、多糖和小分
DNA的酶学操作
DNA的酶学操作DNA Modifying Enzymes (Michael Blaber)Introduction to bacterial restriction/modification system. It provides very useful background knowledge
Thermal－Inactivation
Thermal InactivationA simple, reversible way to a stop restriction reaction is by adding EDTA, which chelates Mg2+, thereby preventing catalysis. If f
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
2d2D电泳
For an in-depth review of the method, see Friedman, K. and B. Brewer (1995) Analysis of replication intermediates by two-dimensional agarose g
Determining－the－Direction－of－Replication－Fork－Movement
For an in-depth review of the method, see Friedman, K. and B. Brewer (1995) Analysis of replication intermediates by two-dimensional agarose gel elect
酶切反应(Setting－Up－a－Restriction－Endonuclease－Reaction)
一、 建立一个标准的酶切反应目前大多数研究者遵循一条规则，即10个单位的内切酶可以切割1μg不同来源和纯度的DNA。通常，一个50μl的反应体系中，1μl的酶在1X NEBuffer终浓度及相应温度条件下反应1小时即可降解1μg已纯化好的DNA。如果加入更多的酶，则可相应缩短反应时间；如果减少酶
Histochemical－staining－of－sea－urchin－embryos－for－(AP)－enzyme－activity
Histochemical staining of sea urchin embryos for alkaline phosphatase (AP) enzyme activity1. Obtain embryo samples, tube of AP substrate buffer and tu
Angiotensinconverting－enzyme－2－regulates－heart－function
Cardiovascular diseases are predicted to be the most common cause of death worldwide by 2020. The major regulator of blood pressure homeostasis is the
TRFLP的优缺点
该技术在应用的过程中，肯定需要在实验条件上不断进行改进，而这种改进的好坏自然而然需要实验结果的验证。。V. Grüntzig在2002年做了该工作的一部分，结果认为，在限制性酶切时，很有必要去除其中影响DNA的酶切过程，并且实验证明了具体的酶切时间。具有说服力的结果如下： 1，T-RFLP出数据的
TRFLP技术的优缺点
T-RFLP（末端限制性片段长度多态性）该技术在应用的过程中，肯定需要在实验条件上不断进行改进，而这种改进的好坏自然而然需要实验结果的验证。V. Grüntzig在2002年做了该工作的一部分，结果认为，在限制性酶切时，很有必要去除其中影响DNA的酶切过程，并且实验证明了具体的酶切时间。具有说服力的
Methods－for－the－Measurement－of－a－Bacterial－Enzyme－Activity－in－Cell－Lysates2
Measurement of ACTase activityNuclear magnetic resonance spect roscopy (NMR)The unique potential of NMR spectroscopy for monitoring simultaneously the
Methods－for－the－Measurement－of－a－Bacterial－Enzyme－Activity－in－Cell－Lysates4
The use of a micro-titre based colorimetric assay provided a third method for the study of ACTase activity, and the most useful for large scale measur
Methods－for－the－Measurement－of－a－Bacterial－Enzyme－Activity－in－Cell－Lysates3
Different enzyme assays for ACTase study in H. pyloriACTase properties were studied in situ in cell-free extracts to obtain information on enzyme func