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A Positive Selection Assay for Mutation Analysis in Big Blue Animals
...ons (37C overnight) to determine the total number of rescued phage screened ( figure 2 , pat...37C. Mutant frequency is determined as the number of l cII plaque-forming units (pfu) observed divided by the total pfu screened. ...New Mammalian Two-Hybrid System Detects Protein-Protein Interactions
... folding of these proteins are valid. 7 Finally, a number of proteins of interest have been discovered to be toxic whenexpressed in yeast. 7 This further underscores the limitations ofusing a single host organism to study eukaryotic proteins. Clearly, developing asystem to study protein-protein interaction...Low Abundance cDNA Cloned Using Stratagenes Human Universal cDNA Library
... protocol allowed us to quickly screen a large number of clones, normalization increased the cha...nefits over conventional protocols. First, a large number of clones can be screened conveniently without the intensive labor of multiple plati...A Versatile Power Supply for All Electrophoresis Applications
...e have tested the SmartPower4000 power supply in a number of applications. These applications include DNAsequencing, horizontal agarose gel electrophoresis, precast protein gelelectrophoresis and electroelution. figure 2 DNA Sequencing. In figure 2 , the Sm...Antibodies for Studying NMDA Receptor Protein Expression and Synapse-Specific Immunolabeling
... the four NR2subunits. 4 In addition, there are a number of different splicevariants of the NR1. 5 Signifi...marker that can be used to monitor synapse number and synaptogenesis. Again, Stratagene offers Anti-Synapsin I with a purified synapsin positi...Automated Fluorescent-Tag Cycle Sequencing
...ritten above the emission plot lines. The relative number of the nucleotide from the primer is indicated. figure 2 panel A shows the sequencing histogram generated using the RoboCycler Gradient 96 temperature cycler with Hot Top Assembly, showing read length to 745 bases. ...Effects of Thermal Cycler Well-To-Well Temperature Uniformity on PCR Results
...et. al. (1997) Strategies 10: 75-76. * US Patent number 5,525,300 and patents pending...Big Blue Rodent Cell Cultures for Mutagenesis Studies
... a thymidine kinase mutant; the chromosome number is polyploid. The spontaneous mutant frequency of this cell line is approximately 3.7 x 10 5 . The Big Blue transgenic mouse embryonic cell line is derived from embryoniccells of transgenic mice containing the Big Blue lambda shuttle vector....Brilliant Core Reagent Kits for QPCR and QRT-PCR
...on of expression level changes.Similarly gene copy number measurements are subject to significant experiment... of the useable lightspectrum and thus reduces the number of different dyes that can be used inmuliplex reactions. Comparison Tests Confirm High Sensitivity ...Control RT-PCR Primers for Human Gene Transcripts with Varying Abundance
...igure 1 and Figure 2 , we used a number of the control primer sets to conduct a PCR analys...fferent transcripts. Consequently, we used a large number of cycles (35 cycles) to maximize the signal. Under these conditions, the plateau ef...Genotyping Single Nucleotide Polymorphisms with Molecular Beacons
...ctorsassociated with complex diseases. There are a number of available methods forSNP genotyping, ranging fr... chromosome (BAC) basedon association studies of a number of SNPs. We genotyped a group of people inthe family and determined the presence of three genotypes....Detecting Gastrin-Releasing Peptide Receptor by in situ PCR on Archived Tissue
...in-embedded archival tissues and ismodified from a number of different methodologies. 11,12 RTISPCR Protoc...rpretation of immunohistochemistry todetermine the number of positive cells should be avoided. Rather, an objectiveapproach, such as quantitative PCR, 13 sho...Safe Production of High-Titer Retrovirus
...chievable for most mitotic celltypes, and the copy number per cell can be easily controlled by varying themu...la: (%fluorescent cells in gated population)(total number of cells infected)(dilution). REFERENCES Miller, A.D. (1997). Development and Applications...New Yeast Cloning System for Producing Proteins with Native Amino Acid Sequences
... 3A & 3B We have expressed and purified a number of recombinant proteins in S. pombe, using the pESP-2 vector and the LIC cloning strategy to create the constructs. The recombinant proteins include human Elk1, Krs2, MEK1 WT and the chicken calmodulin gene product. The yield...Luminol-enhanced Assay for Superoxide Anion (O2 face="Symbol" )
...n cytochrome c reduction but also requires a large number of cells (10 6 )per assay. The third method, luminol-mediated chemiluminescence, is the mostsensitive method of all; accurate readings can extend three orders of magnitudeover the signal range. The Luminol Chemiluminescence Reaction The chain of ev...Novel PCR Enhancing Factor Improves Performance of Pfu DNA Polymerase
... that were carried out using the highest possible number of polymerase units before excessive smear...y of PfuTurbo DNA Polymerase The error rates of a number of DNA polymerases have been measured previouslyin a PCR-based forward mutation assay that utilizes ......ng method yielded similar efficiencies and number of transformants, consistently producing greater than an 80% cloning efficiency for PCR fragments prepared by either ethanol precipitation or the StrataPrep kit (data not shown). Highest Transformation Efficiencies of Ligated DNA Al...Pfu DNA Polymerase as a Hot Start Alternative
...ticeable when amplifying complex, low copy number targets, 6-8 we performed PCR comparisons using several genomic DNA targets that tend to generate troublesome cold start artifacts. The performance of Pfu DNA polymerase was compared to Taq DNA polymerase alone, Taq DNA polym...Comparing Fidelity and Performance of Proofreading PCR Enzymes
...r accurate DNA replication hasgreatly simplified a number of laboratory procedures, including cloning,direct...ons PCR enzyme fidelity has been measured using a number of different methods,including DGGE analyses 3 and monitoring phenotypic changes inmutational targe...PCR Performance Comparisons Between pfuturbo and Taq DNA Polymerases
...d 12). Fidelity Comparisons The error rates of a number of DNA polymerases have been measured previouslyin a PCR-based forward mutation assay, which utilizes the lacIOlacZ a target gene. 3 In these studies, Pfu DNA polymeraseexhibited an average error rate that was two-fold lower than that of Vent and...prostar RT-PCR Systems for Robust High-Fidelity RNA Amplification
... theparticular reaction conditions employed (e.g., number of duplications, pH, and[Mg 2+ ]). The mutation fr...e RT error rate, the DNA polymerase errorrate, the number of cDNA template duplications, and the amplicon size. Forexample, consider the situation when an RNA...pfuturbo DNA Polymerase: A High-Performance, High-Fidelity Enzyme Ideal for PCR Cloning
...tage of recombinant clones per plate (white colony number divided by blue colony number multiplied by 100) and the mean percentage of white colonies that were also CAM-resistant ar...Cell Proliferation Kit Outperforms the Competition in the Range of Cells Typically Counted
Quantitating cell number is more accurate using the Quantos cellproliferati...ovides a simple, reproducible method to assess the number of cells present invarious tissue culture dish formats. In this study, we compared how well the kitp...Map and Link Human Genetic Disorders with SSLP Analysis
...Eachmicrosatellite marker is made up of a variable number of di-, tri-, ortetranucleotide repeats at a parti...y analyzing individualmembers of a pedigree with a number of closely linked markers. These haplotypesallow the transmission of a particular locus through a fa...High-Efficiency Site-Directed Mutagenesis of Large Plasmid Vectors
...in the text and kit manuals. Values represent mean number of transformants from 3 plates. Small-to-moderately sized plasmid DNA templates can be efficientlymutagenized with either QuikChange kit 4 . For such targets, theQuikChange XL kit permits the use of reduced reaction times. For example, the4.5-kb kit...New Protocols for Isolating High- Molecular-Weight Genomic DNA
...heBig Blue SCS-8 E. coli strain to determine the number of pfu perreaction. d Theestimated total pfu recoverable was determined using the number of pfu per reactionmultiplied by the number of estimated reactions achievable from the total volume ...A Simple and Rapid Technique to Purify High-Quality Midiprep DNA
...ectrophotometry. Nearly 350 g of high-copy number pBluescript II SK(+) plasmid DNA was also recovere... a single midispin cup, while the low-copy number pCMV gal plasmid yield from a 200-ml overnight culture was 250 g ( Figure 3 ). Yie...High-Throughput Isolation of Total RNA
...s (g) * Numbers in parenthesis indicate the number of isolations performed. Species .... Numbers in parentheses indicate the number of isolations performed. Cell line 10 4 cells ...Restriction Endonucleases Undergo Rigorous QC Testing to Ensure Optimal Performance
...haracteristic of the 1-hour reactions. The maximum number of units thatclearly exhibit this pattern in the overdigestion reactions is reported on theCertificate of Analysis provided with each enzyme. This overdigestion assay isalso employed on a representative sample following aliquoting and packaging tocon...Functional Cloning Using ViraPort Retroviral cDNA Expression Libraries
...for screening based on gene function. The cDNAcopy number per cell can be easily controlled by adjusting the...ls or cDNA pools usually contained a large number (often hundreds) of extraneous clones in addition to the target cDNA of interest, necessitat...RT-PCR Primer Sets for Human and Mouse Mismatch Repair Genes
... al. (1996) Unpublished, from Genbank accession number U42190. Lui, K., et al. (1994) Gene 147: 169-177. Kolodner, R.D. (1996) Genes and Devel. 10: 1433-1442....Simple, Sensitive Isotyping of Mouse Monoclonal Antibodies
..., has resulted in the development of a significant number ofimmunoglobulins for research and diagnostics. As knowledge concerning theproduction of monoclonal antibodies has grown, these powerful tools have becomemore commonplace, and thousands of new monoclonal antibodies are made each year. Mouse immunogl...CastAway Precast Gels for Rapid Automated DNA Sequence Analysis
...ured gels (data not shown). The total base number per precast gel is greater than 16,000 when the gel is maximally loaded (i.e., 32 sequencing samples). For genetic analysis, STRP banding patterns were obtained using a precast gel on the automated infrared DNA an...Transfection of Green Fluorescent Protein into Human Adrenalcarcinoma Cells
...an others, making it difficult to obtain asuitable number of transfected cells to draw conclusions. Second, ...le tool for research that is dependent on a higher number oftransfected cells in the total cell population. REFERENCES Sarria, A.J., et al. (1990) J...Easily Amplify Genomic DNA with Long-Distance PCR
...ansgenic mice 1 becauseit is fast, allows a large number of samples to be screened at one time,is less labo... This procedure allows fast genotyping of a large number of mice withlong-distance PCR using TaqPlus Long DNA polymerase. Usually, the resultsare ready the d...Versatile Reporter Vectors for Monitoring Viral Transduction
... as a reporter in retroviral vectors has a number of advantages over other reporters. The enzymatic ...stained cells as a percentage of the total number of cells visible in a microscopic grid. As indicated in Table 1 , titers greater th...Improved Sensitivity for Staining RNA with SYBR Gold Stain
...arly shows 250 ng of poly(A) + RNA from a number of samples. To assess the quality of the poly(A) + RNA, we prefer to run 250 ng of RNA which, for a variety of samples, routinely produces a clear image well above the limit of sensitivity. To assess the relative sensitivity ...Enzyme Immunoassay for Studying Intracellular Levels of cAMP
...cAMP-horseradish peroxidaseconjugate for a limited number of binding sites on cAMP-specific antibodies.When ...nd messenger for transduction events that follow a number of extracellularsignals. Typically, the binding of a hormone or neuromodulator to its receptoris fol...Using XL1-Red Mutator Strain to Generate Esterase Variants
...l substrates, such as chromophoric esters, a large number ofclones can be quickly identified by their surrounding red color. Additionally,only a few mutation cycles are necessary to identify an esterase variant, whichhydrolyzes a sterically-hindered substrate. We expect that directed evolutionusing the XL1-...Detect Released Oligosaccharides Using the Eagle Eye II Still Video Imaging System
...ble sample of oligosaccharideprofilesincluding the number of detectable bands, band intensity, and bandsizeusing a Bio-Rad N-linked profiling gel forseparation. We acquired the glucose ladder, E4 (maltotetraose), and E5 (trypsininhibitor) standards from Bio-Rads N-linked oligosaccharide profilingkit. Tran...pFB-ERV: Retroviral Delivery of the Ecdysone Receptor Proteins
...anogaster. 2,3 Theecdysone-inducible system has a number of advantages over alternative systems.Firstly, the lipophilic nature and short in vivo half-life of the ecdysoneanalog ponasterone A (ponA) allow efficient penetrance into all tissuesincluding brain, resulting in rapid and potent inductions and rapi...Fractionating DNA Fragments Generated by Differential Display PCR
...the symptoms ofallergic disease, they also cause a number of detrimental side effects. Thus, agreater unders... provide insights intothe basis of such disease. A number of methods may be used for identifyingdifferentially expressed genes, such as high-throughput sequen...The GeneZoo or the GeneJungle?
...o create artificial clusters and overestimates the number of genes. Did not ligate adapters ...into different clusters. Tends to overestimate the number of genes. Only cluster sequences having a polyA tail, thereby not counting 5 and 3...Randomize Gene Sequences with New PCR Mutagenesis Kit
... is the product of DNA polymerase error rate and number of target duplications (Figure 2)....illustrated in Figure 3 , which shows the number of times an amplicon is copied to produce theoretical yields of 0.5 mg or 10 mg. The...Generate High-Quality, Directional Plasmid cDNA Libraries
... or DH10B*** cells (figure 2). The average number of primary clones obtained from transformation ...ultracompetent cells was 4.6-fold greater than the number of primary clones obtained from XL2-Blue cells and 22-fold greater than obtained fro...Gene-Specific Primers for NMDA Receptor Subunits
...DAR2 (NR2A-D)subunits. 3 In addition, there are a number of different splicevariants of the NR1. 4 Significant functional diversity has been seenin recombinant systems with heterologous coexpression of various NR2 subunitsand/or NR1 splice variants. 5 However, little is known about theexpression of the N...Unique DNA Polymerase Formulation Excels in a Broad Range of PCR Applications
...ymerase blends tested. Over the past few years, a number of DNA polymerases and polymerase blendshave been developed to fulfill a variety of PCR application requirements. TaqDNA polymerase is generally used in routine amplifications of short targets( DNApolymerases* , are the best choices for cloning ap...hNT BlueNeurons Express b-Galactosidase at High Levels
...munodeficiency virus (HIV). An increasing number of reports describe transplantation of hNT neurons... above background) but yielded the largest number of neurons among the three clones that were chosen for differentiation. Fi...High-Titer Retroviral Vectors for Gene Delivery
High transduction efficiency and predictable copy number High-TiterRetroviral Vectors for Gene Delivery...l advantage of retroviral vectors is that the copy number of integratedprovirus can be easily controlled by varying the multiplicity of infection, incontrast ...HSVision Molecular Beacon Detection Module Rapidly Detects Herpes Simplex Virus DNA
... addition, the inclusion of bothhigh- and low-copy number mixed HSV-1/HSV-2 DNA standards permits assaysensitivity to be validated. Using a 96-well format, samples can be completelyscreened in approximately 4 hours. REFERENCES Stanberry, L.R. (1998) Dermatol. Clin. 16(4): 811-816...Identification of Differentially Expressed Gene Products with the CastAway System*
... were outlined with ink and given an identifying number on the second film figure 2 . The dried gel was rehydrated in water overnight and then placed on the second film. Glogos II autorad markers that had been affixed to the glass plate prior to the second exposure provided t...TKB1 Cells Identify Receptor Tyrosine Kinase Interacting Proteins
... receptor tyrosine kinases (RTKs) are activated, a number of proteinswithin the cell are rapidly phosphoryla... 8 This approach is superior to other methods: A number of known candidatemolecules can be quickly and simultaneously screened by immunoblot analyses andbe ...Tools for Detecting MSH2 Expression in Chinese Hamster Ovary Cells
...issues and cells, thenthe RNA is ready to use in a number of applications, including Northern blotanalysis. This procedure features the following products: the Joule Box minigel electrophoresis system, the Stratalinker UV crosslinker,* the prostar first strandRT-PCR kit, Stratagenes primer sets for R...Versatile Transfection Reagent Offers Low Toxicity and Consistent Performance
...ection conditions thatproduce the highest possible number of transfected cells for data analysis. Forthis reason, researchers want to use the reagent that reliably yields thehighest transfection efficiencies for their cell lines. Several studies confirmthat efficiencies vary for different lipid-mediated tra...Mammalian Expression Vector for Efficient Cloning of PCR Fragments
...g kit was verified usinga test gene. To reduce the number of potential mutations that result during PCRamplification and to generate blunt-ended DNA fragments, we chose Pfu DNApolymerase for PCR amplification of the ampicillin-resistancegene. The pCMV-Script vector was digested with Srf I restrictionendon...Tissue Specificity for Mutation Parallels Tissue Specificity for Cancer
...NA change at the molecular level; when asufficient number of mutants have been sequenced, a mutational spect...rately predicts mutations inspecific tissues. In a number of cases, mutations are recovered in tissues thatare not targets for carcinogenesis. While this ease...New Competent Cells for Highest Transformation Efficiencies
...for researchers making plasmidlibraries: the total number and size distribution of primary transformants isk...pCMV-Script vector library. The increase in colony number for XL10-Goldultracompetent cells provides compelling evidence that XL10-Gold cells are moreefficien...Stratagenes Human cDNA Microarrays: Perform Gene Expression Profiling and Discover New Genes
...s from our innovative libraries and contains ahigh number of clones that do not have significant nucleotide ... expressionprofiling with gene discovery. The high number of unknown and uncharacterizedclones in the clone collection and on the microarrays greatly increase...Fast Isolation of Total RNA from Small Numbers of Cells
...rescence in this conformation. The threshold cycle number (C t ) is inversely proportional to the concentration of target sequence in the reaction. 8 The Mx4000 molecular beacon GAPDH expression analysis kit specifically detects GAPDH mRNA sequences but not genomic DNA or ...High-Efficiency Transfections Achieved with New Low-Toxicity Reagent
...s evaluated, GeneJammer reagent showed the highest number ofliving transfectants for all cell lines tested. ...sfection efficiency, low toxicity, and the highest number of viable transfectants. Transfection of Primary Cells One important measure...Other ContentssuppressorsuppressorsuppressorsuppressorsuppressorsuppressortunicatunicaturnoverturnoverturnoverturnoverturnoverturnovertympanictympanicubiquitinubiquitinubiquitinubiquitinulnaulnaOther TagsSUISUISUISUIHillHillViroViroViroViroViroPlugsNoroOther Tagsaffairs 2affairs 3affairs 4affairs 5structured 2structured 3giving 2giving 3giving 4giving 5giving 6giving 7giving 8giving 9cluster 2cluster 3cluster 4pointing 2summer 2summer 3summer 4summer 5
(Date:7/1/2009)...argest study to date of endometriosis in pregnant ... factor for premature birth, the 25th annual confe...n and Embryology heard today (Wednesday July 1). D... Child Health, Karolinska Institute, Stockholm, Sw... endometriosis also had a higher risk of other pre...
(Date:6/30/2009)...have shown that if elderly men were given growth h...ble muscle mass increase. Dr. Geoff Goldspink (Roy... says: "This raises the question: Can age-related ... ameliorated by the therapeutic application of mec... can also help sufferers of diseases such as muscu...
(Date:6/30/2009)... forest biotechnology to help address significant ...d at birth" by the rigid opposition of some groups...e testing of genetically modified trees, scientist...o create a regulatory environment that considers g...-case basis, and is focused on the end product rat...
(Date:6/30/2009)...f Physics and Astronomy at the University of Leice...has led them to the discovery of fluorescent silic... uptake of drugs by the body,s cells. , Dr Klaus...ew method is the independent control of the nanopa...thod is extremely versatile and produces the fluor...
Breaking Biology News(10 mins):Women with endometriosis need special care during pregnancy to avoid risk of premature birth 2Anti-biotech groups obstruct forest biotechnology 2Anti-biotech groups obstruct forest biotechnology 3University of Leicester researchers discover new fluorescent silicon nanoparticles 2Prince William Health System and Novant Health Agree on Partnership to Expand Quality Healthcare in Northern Virginia 40863 1Prince William Health System and Novant Health Agree on Partnership to Expand Quality Healthcare in Northern Virginia 40863 2Prince William Health System and Novant Health Agree on Partnership to Expand Quality Healthcare in Northern Virginia 40863 3Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 1Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 2Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 3Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 4Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 5Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 6Siemens Highlights Cardiology Excellence from Prevention to Follow up at ACC 2009 40859 7Cardium Reports on Applicability of Corgentin to Stem Cell Therapies 3A Independent Studies Indicate that Ad5IGF 1 Potentiates Stem Cells to Improve C 4086 1Cardium Reports on Applicability of Corgentin to Stem Cell Therapies 3A Independent Studies Indicate that Ad5IGF 1 Potentiates Stem Cells to Improve C 4086 2Cardium Reports on Applicability of Corgentin to Stem Cell Therapies 3A Independent Studies Indicate that Ad5IGF 1 Potentiates Stem Cells to Improve C 4086 3Cardium Reports on Applicability of Corgentin to Stem Cell Therapies 3A Independent Studies Indicate that Ad5IGF 1 Potentiates Stem Cells to Improve C 4086 4Cardium Reports on Applicability of Corgentin to Stem Cell Therapies 3A Independent Studies Indicate that Ad5IGF 1 Potentiates Stem Cells to Improve C 4086 5Cardium Reports on Applicability of Corgentin to Stem Cell Therapies 3A Independent Studies Indicate that Ad5IGF 1 Potentiates Stem Cells to Improve C 4086 6Two Hutchinson Center researchers named HHMI Early Career Scientists 7734 1Two Hutchinson Center researchers named HHMI Early Career Scientists 7734 2[0] Women with endometriosis need special care during pregnancy to avoid risk of premature birth[0] Triggering muscle development -- a therapeutic cure for muscle wastage?[0] Anti-biotech groups obstruct forest biotechnology[0] University of Leicester researchers discover new fluorescent silicon nanoparticles
(Date:7/3/2009)...ing will lead to treatments, , , FRIDAY... they,ve found a major cellular flaw that may driv...hen caught early, lung cancer can often be treated...e is well advanced. Though doctors can sometimes p...rings back more virulent than ever, frequently spr...
(Date:7/3/2009)...re-Asia/ -- Sundia MediTech, a leading,integrated...mpany in Shanghai,China announced today that Dr....nt of Chemistry Services. , Prior to joinin...s, a drug,discovery and development company in Sa... to Senior Director of Medicinal Chemistry of Neur...
(Date:7/3/2009)...anies and three individuals have been recognized f...ional competition designed to reward workplace hea...yXChange.org community released its 2009 Saxcies g...w.safetyxchange.org/saxcies-video . The winners an...e their lives to keeping others safe - are detaile...
(Date:7/3/2009)...hitaker, MD, a founder of the alternative health m...in.com, a new informational Web site devoted to al...ions. , Potomac, MD (Vocu...of the alternative health movement, is now a featu...onal Web site devoted to all aspects of joint and ...
Breaking Medicine News(10 mins):Health News:Cell Pathway May Be Key to Lung Cancer's Spread 2Health News:Cell Pathway May Be Key to Lung Cancer's Spread 3Health News:Sundia MediTech Appoints Dr. Chen Chen as Senior VP of Chemistry 2Health News:Excellence in Workplace Safety Recognized as 2009 Saxcies Award Winners Named 2Health News:Excellence in Workplace Safety Recognized as 2009 Saxcies Award Winners Named 3Health News:Excellence in Workplace Safety Recognized as 2009 Saxcies Award Winners Named 4Health News:Dr. Julian Whitaker Featured on Searchjointpain.com 2| Copyright © 2003-2009 Bio-Medicine. All rights reserved. ABOUT | CONTACT US | DISCLAIMER | PRIVACY POLICY | TERMS AND CONDITIONS |  |