PreparationofbOGDOPGmixedmicelles
Materials:All glassware must be acid washed, rinsed thoroughly with water then rinsed with acetone and dried.Redistill acetone.Recrystallizing BOG:1) Add 5 grams of Octyl-b-D-glucopyranoside (bOG = Calbiochem #494459) to 20 ml acetone.2) Heat mixture at 40°C to completely dissolve the bOG.3) Filter solution through a Pyrex® scintered glass funnel.4) Slowly add 100 ml diethyl ether to the filtered solution and re-heat......阅读全文
详述脂类的消化和吸收
正常人一般每日每人从食物中消化的脂类，其中甘油三脂占到90%以上，除此以外还有少量的磷脂、胆固醇及其酯和一些游离脂肪酸(free fatty acids)。食物中的脂类在成人口腔和胃中不能被消化，这是由于口腔中没有消化脂类的酶，胃中虽有少量脂肪酶，但此酶只有在中性PH值时才有活性，因此在正常胃液
蛋白质提取与制备(Protein－Extraction－and－Preparation)2
三、蛋白质提取与制备具体操作方法1、原料的选择早年为了研究的方便，尽量寻找含某种蛋白质丰富的器官从中提取蛋白质。但至目前经常遇到的多是含量低的器官或组织且量也很小，如下丘脑、松果体、细胞膜或内膜等原材料，因而对提取要求更复杂一些。原料的选择主要依据实验目的定。从工业生产角度考虑，注意选含量高、来源丰
Preparation－of－Genomic－DNA－from－Bacteria－using－Phase－Lock－GelTM
Preparation of Genomic DNA from Bacteria- using Phase Lock GelTM (Modified from Experimental Techniques in Bacterial Genetics, Jones and Bartlet, 1990
蛋白质提取与制备(Protein－Extraction－and－Preparation)4
蛋白质提取液中，除包含所需要的蛋白质（或酶）外，还含有其它蛋白质、多糖、脂类、核酸及肽类等杂质。除去的方法有：1）核酸沉淀法该法可用核酸沉淀剂和氯化锰、硫酸鱼精蛋白或链霉素等。必要时也可用脱氧核糖核酸酶除去核酸。即在粗匀浆中加入少量DNase,于4℃保温30～60min，可使DNA 降解为足够小的碎
反向微柱的准备Preparation－of－ReversedPhase－Microcolumns
INTRODUCTIONOne versatile strategy for sample cleanup prior to MALDI-MS analysis uses microscale columns designed for direct sample elution onto the M
蛋白质提取与制备(Protein－Extraction－and－Preparation)6
PH 值：与沉淀蛋白质或酶原理相同，结晶的溶液PH 值一般选择在被结晶的蛋白质或酶的等电点附近，以利于晶体的析出。温度：除少数情况外，通常选择低温条件进行。低温条件对蛋白质和酶不仅溶解度低且不易变性。在中性盐溶液中结晶时，温度可在0℃至室温范围内选择，在有机溶剂中结晶一般要求温度较低。晶种：不易结晶
蛋白质提取与制备(Protein－Extraction－and－Preparation)5
确定沉淀蛋白质所需硫酸铵浓度的方法将少量样品冷却到0～5℃，然后搅拌加入固体硫酸铵粉末，见蛋白质产生沉淀时，离心除去沉淀，分析上清液确定所要蛋白质的浓度，如它仍在溶液中则弃去沉淀，再加更多的硫酸铵于上清液中，直到产生蛋白质沉淀时止。以所要提取的蛋白质在溶液中的浓度对硫酸铵浓度作图，得沉淀曲线，找出蛋
蛋白质提取与制备(Protein－Extraction－and－Preparation)1
蛋白质提取与制备蛋白质种类很多，性质上的差异很大，既或是同类蛋白质，因选用材料不同，使用方法差别也很大，且又处于不同的体系中，因此不可能有一个固定的程序适用各类蛋白质的分离。但多数分离工作中的关键部分基本手段还是共同的，大部分蛋白质均可溶于水、稀盐、稀酸或稀碱溶液中，少数与脂类结合的蛋白质溶于乙醇、
蛋白质提取与制备(Protein－Extraction－and－Preparation)3
水溶液提取：大部分蛋白质均溶于水、稀盐、稀碱或稀酸溶液中。因此蛋白质的提取一般以水为主。稀盐溶液和缓冲溶液对蛋白质稳定性好、溶度大，也是提取蛋白质的最常用溶剂。盐溶液提取：以盐溶液及缓冲液提取蛋白质进常注意下面几个因素。盐浓度等渗盐溶液尤以0.02～0.05mol/L 磷酸盐缓冲液和碳酸盐缓冲液常用
Application－Note:－Qdot®－Nanocrystal－Conjugates－in－Flow－Cytometry
实验概要Researchers today are trying to maximize the information that they get out of flow cytometry experiments by looking at more parameters in a sing
Streptomyces:Protocols/Spore－Prep
Spore Prep - Inoculating & HarvestingDescription A spore prep is a method of preserving a sporulating strain of Streptomyces. The stock is stored in 2
Western－blotting样品准备－（二）
Sodium orthovanadate preparationAll steps to be performed in a fume hood. a. Prepare a 100 mM solution in double distilled water. b.
DNA电泳
DNA电泳（主要内容如下） Preparation of Agarose Gel and Electrophoresis Extraction of DNA From Agarose Gel Extraction of DNA from Acrylamide Gels DNA Marker
Combined－Flow－Cytometric－Measurement－of－Two－CellSurface－Antigens
INTRODUCTIONFlow cytometry is frequently used to assess nucleic acid content in individual cells. Based on DNA content alone, however, cells in the qu
Sartorius超滤产品在生物医学纳米载体制备中的应用（二）
Sartorius超滤设备MWCO 超滤目的参考文献Vivaspin® 20100 kDa纯化和浓缩步骤7Vivaspin® 20100 kDa清洗步骤8Vivaspin® 205 kDa纯化步骤17Vivaspin® 610 kDa分离纳米颗粒 | 染料和清洗18Vivaspin®10 kDa纯化
Construction－and－Manipulation－of－LargeInsert－Bacterial－Clone－Libraries
Acknowledgements The organizer of the workshop acknowledges Dr. Murray Milford, Professor and Interim Head, and Dr. Mark Hussey, Professor and Interim
MetalEnhanced－Immu...－（二）
实验步骤1. Preparation of Fluorescein-Doped PVA FilmsThe 0.5% PVA solution containing disodiumfluorescein was spin-coated on slide substrates at 3,000 rp
蛋白质相互作用
Interaction Trap/Trap Two-Hybrid System· Yeast Two-Hybrid System (Finley Lab)This is one of the most comprehensive and detailed guide to yeast
高通量的PCR模板植物基因组DNA制备方法（三）
将纯化定量的水稻品种(93-11)基因组DNA标准样品(0.5~8 ng)与1.0 µL本方法制备的水稻品种(02428)基因组DNA混合作为模板，用InDel 标记引物(表1)进行PCR扩增和PAGE检测。箭头指某反应(或2个反应之间)其02428与93-11条带的信号值大致相等(即DNA
Large－Scale－Plasmid,－Cosmid,－BAC,－PAC,－and－Fosmid－DNA－Isolation
DNA Isolation by a Cleared Lysate Method Followed by Double Acetate Precipitation Version 3b - updated September 26, 1999The Most Recent Roe Lab Imple
DSPEMPEG2000脂质体制备配方及使用说明
说到PEG磷脂，你会在多个脂质体产品配方中看到DSPE-MPEG2000的身影，可以说脂质体制备往往离不开DSPE-MPEG2000，这是为什么呢？本期AVT小编就来给大家解答这个疑惑。也许有的小伙伴会好奇，DSPE-MPEG2000到底是一个怎样的产品？小编这给大家简单介绍一下。DSPE-MPEG
Bovine－Ig(Total－Immunoglobulin)－ELISA－Kit使用说明（二）
Note: Samples to be used within 5 days can be stored at 4°C, besides that, samples must be stored at -20°C (assay ≤1 month) or -80°C(assay≤2 month
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
Streptomyces:Protocols/Conjugation
Intergeneric Conjugation and OverlayDescription Transfer of plasmid/cosmid DNA from a host strain, e.g. E.coli ET12567 [pUZ8002], to the recipient str
Phage－Titer
IntroductionLambda phage is a commonly used vector for transgenes. Its very high rate of infectivity makes it ideal for creating large numbers of clon
Protocol－for－competitive－RTPCR
For quantifying mRNA, we use a competitive RT-PCR protocol with internal standard RNAs. These are added in a defined quantity to the RNA sample prior
Western－blotting样品准备
实验概要Preparation of lysis buffers, protease and phosphatase inhibitors, lysate from cell culture, lysate from tissues, protein concentration, samples
Streptomyces:Protocols/MiniMaxi－Prep
Small Scale Plasmid Isolation (Mini / Maxi Prep)Description A mini prep / maxi prep is used to isolate plasmid or cosmid DNA from bacteria, normally E
DNA微序列技术
· Protocols for Making Drosophila Arrays (Stanford U.)Detailed protocol for making arrays including PCR Amplification of cDNAs for Printing,
Basics－of－Electrochemical－Impedance－Spectroscopy（七）
Mixed Kinetic and Diffusion ControlConsider a cell where semi-infinite diffusion is the rate determining step, with a series solution resistance a