TOPO™ TA Cloning™ Kits for Subcloningは、Taqポリメラーゼ増幅PCR産物をサブクローニング用のプラスミドベクターに直接挿入するための、5分間の高効率ワンステップクローニング戦略(「TOPO™クローニング」)を提供します。各キットは、サブクローニングに便利な制限部位を含むpCR™ 2.1-TOPO™ TAベクターを使用します。クローニングキットは、お客様のニーズや予算に応じて、さまざまなコンピテントセル付きまたはコンピテントセルなしでご利用になれます。TOPO™ TA Cloning™ Kits for Subcloningの特長:
Can I store my competent E. coli in liquid nitrogen?
We do not recommend storing competent E. coli strains in liquid nitrogen as the extreme temperature can be harmful to the cells. Also, the plastic storage vials are not intended to withstand the extreme temperature and may crack or break.
How should I store my competent E. coli?
We recommend storing our competent E. coli strains at -80°C. Storage at warmer temperatures, even for a brief period of time, will significantly decrease transformation efficiency.
What is the difference between the pCR2.1-TOPO and pCR4-TOPO vectors?
The vector backbones for both of these vectors are very similar. The main difference is that the pCR4-TOPO vector has sequencing primer sites located as close as 33 base pairs from the PCR product insertion site. This minimizes the amount of vector DNA sequence that needs to be read before reaching the sequence of the insert, making the pCR4-TOPO vector very useful for sequencing applications.
What is the difference between the pCR2.1-TOPO and pCRII-TOPO vectors?
The vector backbones for both of these vectors are very similar. The main difference is that the pCRII-TOPO vector is a dual promoter vector, containing the SP6 and T7 promoters for in vitro transcription/sequencing, whereas the pCR2.1-TOPO vector contains only the T7 promoter for in vitro transcription/sequencing. Both vectors contain the M13 Forward and Reverse primer sites for sequencing or PCR screening.
Your TOPO cloning kits contain a control template and control primers. Can I obtain the sequence of the control template?
The sequence of the control template is proprietary.
Efficacy, safety, and pharmacokinetics of imatinib dose escalation to 800 mg/day in patients with advanced gastrointestinal stromal tumors.
Authors:Yoo C, Ryu MH, Ryoo BY, Beck MY, Kang YK
Journal:Invest New Drugs
PubMed ID:23591629
'Imatinib dose escalation has been suggested as an effective therapy for advanced gastrointestinal stromal tumors (GIST) after progression on the standard dose. We evaluated the efficacy, tolerability, and pharmacokinetics of imatinib dose escalation. Eighty-four patients with GIST who received imatinib 800 mg/day as second-line therapy were reviewed. In 66 patients, imatinib ... More
Use of cell-SELEX to generate DNA aptamers as molecular probes of HPV-associated cervical cancer cells.
Authors:Graham JC, Zarbl H
Journal:PLoS One
PubMed ID:22536456
'Disease-specific biomarkers are an important tool for the timely and effective management of pathological conditions, including determination of susceptibility, diagnosis, and monitoring efficacy of preventive or therapeutic strategies. Aptamers, comprising single-stranded or double-stranded DNA or RNA, can serve as biomarkers of disease or biological states. Aptamers can bind to specific ... More
A streamlined method for detecting structural variants in cancer genomes by short read paired-end sequencing.
Authors:Mijuškovic M, Brown SM, Tang Z, Lindsay CR, Efstathiadis E, Deriano L, Roth DB
Journal:PLoS One
PubMed ID:23144753
Defining the architecture of a specific cancer genome, including its structural variants, is essential for understanding tumor biology, mechanisms of oncogenesis, and for designing effective personalized therapies. Short read paired-end sequencing is currently the most sensitive method for detecting somatic mutations that arise during tumor development. However, mapping structural variants ... More
Two CRISPR-Cas systems in Methanosarcina mazei strain Gö1 display common processing features despite belonging to different types I and III.
Authors:Nickel L, Weidenbach K, Jäger D, Backofen R, Lange SJ, Heidrich N, Schmitz RA
Journal:RNA Biol
PubMed ID:23619576
The clustered regularly interspaced short palindromic repeats (CRISPR) system represents a highly adaptive and heritable defense system against foreign nucleic acids in bacteria and archaea. We analyzed the two CRISPR-Cas systems in Methanosarcina mazei strain Gö1. Although belonging to different subtypes (I-B and III-B), the leaders and repeats of both ... More
Camphor pathway redux: functional recombinant expression of 2,5- and 3,6-diketocamphane monooxygenases of Pseudomonas putida ATCC 17453 with their cognate flavin reductase catalyzing Baeyer-Villiger reactions.
Authors:Iwaki H, Grosse S, Bergeron H, Leisch H, Morley K, Hasegawa Y, Lau PC
Journal:Appl Environ Microbiol
PubMed ID:23524667
Whereas the biochemical properties of the monooxygenase components that catalyze the oxidation of 2,5-diketocamphane and 3,6-diketocamphane (2,5-DKCMO and 3,6-DKCMO, respectively) in the initial catabolic steps of (+) and (-) isomeric forms of camphor (CAM) metabolism in Pseudomonas putida ATCC 17453 are relatively well characterized, the actual identity of the flavin ... More