Skip to main content
Addgene

Enter a sequence to perform a BLAST-based search of Addgene plasmid sequence databases.

In Category

We narrowed to 290 results for: poly

Showing: 21 - 40 of 290 results

  1. Adeno-associated virus (AAV) Guide

    Type
    Guide
    ...increased nuclear export. Poly(A) signal in cis The polyadenylation or poly(A) signal aids in the nuclear...vector capsid. Icosahedral Having the shape of a polyhedron with 20 faces, each being an equilateral triangle...

  2. Antibody Guide

    Type
    Collection
    ...lower background signals than polyclonal antibodies. However, polyclonal antibodies are more sensitive...clone that are specific to a certain epitope, or polyclonal, meaning there are many clones that are specific... antibodies are typically more expensive than polyclonal antibodies. Environmental factors, binding partners...available epitope on your protein of interest. Polyclonal antibodies are typically collected directly from...targeting various epitopes on the same antigen. Polyclonal antibodies are often more environmentally stable...protein in any form it may be present in. However, polyclonals can vary significantly from lot to lot, as immune...consider the following questions: Do you need polyclonal or monoclonal antibodies? Will you be using a...

  3. March for Science

    Type
    Blog Post
    ...civilization in general (1). Science and politics? Science is an apolitical process for seeking knowledge. The...inclusion of science to inform policy (17). The facts surrounding a matter or policy should have more weight ...science rallies scientists to political action, and inspires politicians and citizens to include science... again. No part of this process is inherently political so why is there a march in Washington, D.C., the... the seat of the United States government? Politics and science are intrinsically linked: governments ...when we drop them. Scientific realities limit what policy can do and, in this way, science has always been...been related to government and, consequently, politics. More concretely, scientists gather information ...

  4. Minigenomes - a Safe Way to Study Dangerous Viruses Like the Ebola Virus

    Type
    Blog Post
    ... own RNA-dependent RNA polymerase into the infected cells. The EBOV polymerase replicates the viral genome...under control of a T7 RNA polymerase promoter sequence. Thus, T7 RNA polymerase also needs to be present...gene start) and a transcription termination/polyadenylation signal sequence (gene end). A minigenome is...replication and reporter gene transcription by the EBOV polymerase (reviewed in 2, 5). The minigenome is capable...nucleoprotein, NP. NP associates with the viral polymerase, which is formed by a complex of two proteins...sense, single-stranded RNA minigenome. The viral polymerase complex then recognizes the encapsidated minigenome... order to replicate the minigenome, the viral polymerase initiates RNA synthesis at the 3’ end of the ...

  5. To Each HIS Own

    Type
    Blog Post
    ...purification based on the polyhistidine tag. What is the polyhistidine tag? The polyhistidine tag is a string of...      Fig. 1: A sample containing a polyhistidine tagged protein of interest (purple) and several...to the Ni2+ and is immobilized along with a polyhistidine containing contaminating protein (orange). A...is successfully isolated.   Prior to the polyhistidine tag, alternative fusion tags were used, such...interfering with protein function. In contrast, the polyhistidine tag is very small and rarely affects protein...function (Bornhorst 2000).  One downside of polyhistidine tag-based purification, however, is the propensity... containing Co2+, have a lower affinity for polyhistidine than more commonly used substrates such as Ni2...

  6. Data Freedom: The Expansion of Data Sharing in Research Publications

    Type
    Blog Post
    ...Sharing Policy Discussion PLOS’ New Data Policy: Public Access to Data PLOS’ New Data Policy: Part Two...advice about the scope of the policy. End of story? Not quite. The PLOS policy on data access is a formal...clarified what the policy intent was and provided an FAQ list to further explain the policy. The fact that...year when it announced its data access and sharing policy. Since early March, the open access publisher has...the research reported in PLOS publications. The policy was not an overnight revelation, rather it was ...reasonable. PLOS has since clarified their data sharing policy and recently announced that of the 16,000 manuscripts...agencies (e.g. Wellcome Trust, NIH Data Sharing Policies, etc.) and is founded on the principle that scientific...

  7. With an Eye Towards the Future, We Look Back at the March for Science

    Type
    Blog Post
    ...approach policy makers take in abusing climate science skepticism to promote harmful policies that benefit...move slowly, news about possible broad changes to policies seems to break everyday. Many researchers and ...participation in government, evidence to inform policies, a protected place to work, funding for science...medicines, technologies, defense, and governing policies are developed primarily by wishful thinking. The...rains, it was weather befitting of the ominous political climate in which American scientists find themselves...scientists found themselves not too long ago.   From policies that “muzzle” government scientists to the de-...Canada.  Outside the lab, she dabbles in science policy, public outreach, and restorative justice.  Follow...

  8. Site Directed Mutagenesis by PCR

    Type
    Blog Post
    ...you need a high-fidelity polymerase. There are many high fidelty polymerases on the market; you need one...a DNA polymerase that produces blunt-ended PCR products (e.g. Phusion, Pfu, and Vent polymerases). Note... PCR followed by Restriction Fragment Length Polymorphism (RFLP) analysis (right). Introduction of restriction...amplified fairly easily by simply following the polymerase manufacturers’ PCR protocol. Be sure to adjust...plasmid template for site directed mutagenesis.  Polymerase To ensure that you don’t introduce undesired ... one with 5’->3’ polymerase activity (for amplification), 3’->5’ exonuclease activity (increases amplification...Note that certain polymerases such as Taq generate A-overhangs (a feature used in TA-cloning). Such non-complementary...

  9. CRISPR Plasmids - Empty gRNA Vectors

    Type
    Collection
    ...Marchantia polymorpha MpU6 none S. pyogenes Hara-Nishimura pMpGE_En03 71535 Other/Marchantia polymorpha MpU6...pyogenes Ventura pCRISPRyl 70007 Other/Yarrowia lipolytica SCR1'-tRNA yes, cut S. pyogenes LEU2 Wheeldon...pyogenes Draetta pCAS1yl 73226 Other/Yarrowia lipolytica yes, cut S. pyogenes LEU2 Yang pLCKO 73311 Mammalian...Gateway recombination-based cloning of complex polycistronic lentiviruses. Can express Cas9 with up to 3 ...in a single vector. sgRNAs are expressed as polycistronic glycine tRNA-gRNA genes (PTGs) and then PTG ...

  10. Plasmids 101: The Promoter Region – Let's Go!

    Type
    Blog Post
    ...      The RNA polymerase(s) RNA is transcribed from DNA using an RNA polymerase (RNAP). In bacteria...bacteriophage Constitutive, but requires SP6 RNA polymerase. SP6 polymerase has a high processivity. When used for...describes the combination of the promoter (RNA polymerase binding site) and operators (response elements...promoter region controls the binding of the RNA polymerase and transcription factors, therefore promoters...single enzyme; however, eukaryotes have muliple polymerases which are each responsible for a specific subset... used in expression systems for Drosophila. Polyhedrin General expression mRNA  Strong insect promoter... H1 small RNA expression shRNA From the human polymerase III RNA promoter Constitutive  May have slightly...

  11. Genomic Deletions in Mammalian Cell Lines

    Type
    Collection
    ...Ligation Buffer, 6.5 μl ddH 2 O, and 0.5 μl T4 Polynucleotide Kinase (PNK) (10,000 U/ml). NOTE: Phosphorylated...acceptable. The bulk sorted cells are composed of a polyclonal population exposed to sgRNA-A and sgRNA-B (see... band” in separate reactions. NOTE: Numerous polymerases may be used for step 6.3 . Run samples in a thermocycler...a single reaction. Optimize multiplexing in a polyclonal population ( i.e., bulk sorted cells) before ...biallelic deletion clones with a proofreading polymerase and clone the amplicons ( e.g., with a PCR cloning...

  12. Engaging with science and society at pgEd

    Type
    Blog Post
    ...path to science policy and science communication A career in science communication or policy requires broad... space of science education, communication, and policy. In this post, I hope to tell you a little more...technologies and as societal participants in the political process. My role at pgEd I have always been very...attending seminars in bioethics, public health, science policy, and science and technology studies (STS). I also...genetics research, their applications and regulatory policies; keeping tabs on the conversation about genetics...posts, lesson plans, or information briefs for policymakers. The rapidly changing landscape of genetics ...seminars, symposia, or courses in social, health or policy-related topics, as time permits. Also seek out ...

  13. Plasmids 101: TOPO Cloning

    Type
    Blog Post
    ... comes from using Taq polymerase for the amplification step since Taq polymerase leaves a single deoxyadenosine...mind that Taq polymerase has an error rate of about 1 in 3,500 bases. Typically polymerases with proofreading...and amplify your sequence of interest with Taq polymerase using your favorite PCR protocol.  2. Set Up ...to reduce error rates; however, proofreading polymerases will also remove all unpaired 3’ ends in your... 2. Novel approach to molecular cloning and polynucleotide synthesis using vaccinia DNA topoisomerase....

  14. Plasmids 101: Sequence and Ligation Independent Cloning (SLIC)

    Type
    Blog Post
    ...The key is T4 DNA polymerase, which has 3′→5′ exonuclease activity. T4’s polymerase activity can be thwarted...thwarted if no dNTPs are available to polymerize, allowing the slower exonuclease activity to proceed.... of the chosen nucleotide, T4 will switch to polymerizing and then stall due to the absence of the other...dNTP present in the exonuclease reaction or polymerization will occur at that position, preventing T4 ...target vector. 5′ overhangs can be generated by T4 polymerase (left branch); by annealing two separate PCR ...advantage of SLIC over Gibson assembly is cost, as T4 polymerase is much less expensive than the enzymes required...

  15. Antibodies 101: The Basics of Western Blotting

    Type
    Blog Post
    ... protein mix by size Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) is the first...of a resolving gel composed of the crosslinked polymer acrylamide. In addition to the samples, a protein...membrane, usually composed of a nitrocellulose or polyvinylidene difluoride (PVDF) in a step called protein ...state while a western blot detects denatured polypeptide chains. The protein regions available for antibody...between a protein in its native state versus the polypeptide chain. Consequently, antibodies validated for...transfer of proteins from sodium dodecyl sulfate-polyacrylamide gels to unmodified nitrocellulose and radiographic...) Electrophoretic transfer of proteins from polyacrylamide gels to nitrocellulose sheets: procedure and...

  16. Technique: Probe Phage Genomes for Host Binding Proteins

    Type
    Blog Post
    ...downstream manipulations. Phi29 polymerase is a phage-derived polymerase that can perform whole genome ... approaches a host cell surface are complex polysaccharide structures, many of which are easily varied...fragmentation, repair sheared ends with T4 DNA polymerase (to create blunt ends) and ligate into a bluntly...manipulation, amplifying phage DNA with phi29 polymerase prior to fragmentation can greatly facilitate...into E. coli BL21 (DE3) cells (these have the T7 polymerase and a few proteases knocked out making them particularly...

  17. 15 Hot Plasmids from 2017

    Type
    Blog Post
    ...to express the transcription factors from a polycistronic cassette. However, it was unknown whether variations...variations in gene expression from these polycistronic cassettes could lead to comparable experimental...Woltjen Lab compared different variants of the polycistronic cassettes and discovered reprogramming discrepancies...variation in the Klf4 isoform (KLF4s or KLF4L). Polycistronic cassettes that contained KLF4s had overall diminished...reprogramming and global gene expression patterns. Polycistronic cassettes that contained the KLF4L isoform had...the observed reprogramming discrepancies. The polycistronic piggyBac transposon vectors tested in this work.... They are compatible with both agarose and polyacrylamide gels. They are shared through Addgene without...

  18. Technical Design of a Western Blot

    Type
    Blog Post
    ...lot number while you’re at it! Polyclonal or monoclonal Both polyclonal and monoclonal antibodies can ...can work well for a western blot. Polyclonal antibodies, which bind to multiple sites on an antigen, are...protein — can be used to reproduce the benefits of polyclonal antibodies. Because these mixtures are defined...are not as commonly available as monoclonal or polyclonal antibodies, but it’s worth a look to see if they...Precast gel Increased cost Save money Polyclonal antibodies Higher non-specific binding; lot-to-lot...available; cost varies widely Increase signal Polyclonal antibodies Higher non-specific binding; lot-to-lot...

  19. Viral Production

    Type
    Collection
    ...Samples of viral preparations are subjected to polyacrylamide gel electrophoresis (PAGE) followed by silver...centrifugation and then by filtration through a 0.45 µm polyethersulfone (PES) membrane. The preparations are then ... 293T cell line in the presence of 10.0 μg/mL polybrene. This ensures that any loss of titer associated...

  20. Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells

    Type
    Blog Post
    ...incubating Nanoblade particles with polybrene, a cationic polymer. Polybrene has long been used to increase...from Mangeot et al., 2019.   MLV GAG-POL polyprotein Nanoblades are formed when viral structural proteins...protease, supplied as part of the MLV Gag-Pol polyprotein, cleaves the proteolytic site connecting the ...
Showing: 21 - 40 of 290 results