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Showing: 21 - 40 of 513 results

  1. Plasmids 101: Gibson Assembly and Other Long-Homology Based Cloning Methods

    Type
    Blog Post
    Published
    March 1, 2016, 3:30 p.m.
    ...basics of Gibson assembly as a parody of “Breakfast at Tiffany’s.” Overview of Gibson assembly The Gibson assembly...gain in popularity. Gibson assembly is well known for allowing easy assembly of multiple linear DNA fragments...Miller Lab Protocol). The Gibson assembly process can be used to assemble up to 6 fragments in one step,...design primers for Gibson Assembly. For a simple example of using Gibson assembly, imagine that you want ...annealing and priming of neighboring assembly fragments. Gibson assembly is commonly used in synthetic biology...in 2013 found that Gibson assembly was one of the most commonly used assembly methods (Kahl 2013). However...cut out via CRISPR and then assembled into a vector using Gibson assembly. In this case the vector was...

  6. Bricking Science: Portraying Scientific Reality Through LEGO

    Type
    Blog Post
    Published
    Nov. 29, 2016, 3:30 p.m.
    ...started, the hardest part of the process was to embed personality in pieces of plastic, but it’s gotten...pictures, one for each position in a movement, and assembling the many pictures together to form the full movement...when we started was creating a LEGO stage that resembles a real laboratory. It only took one night to build...

  9. Troubleshooting and Optimizing a Western Blot

    Type
    Blog Post
    Published
    Sept. 17, 2024, 1:15 p.m.
    ... your membrane, run a double-membrane transfer with a psi membrane stacked behind the p membrane. If your...through the p membrane into the psi membrane, that’s a good indication that the p membrane pores are too...marked on the membrane (1) using the gel as a guide. The gel is then removed from the membrane (2) and the...troubleshoot.   Before you start… Mark your membrane! Membranes look the same from both sides, so it’s quite...appropriately sensitive. If using a PVDF membrane, you can dry the membrane, wet it with 20% methanol, and place...completely through the membrane or larger proteins not transferring completely onto the membrane. If you’re not...completely through your membrane to the other side), you can check by using two membranes during your transfer...

  10. Antibodies 101: Stripping and Reprobing Western Blots

    Type
    Blog Post
    Published
    Aug. 1, 2024, 1:15 p.m.
    ... your gel and membrane transfer as normal. Immediately after transfer, dry the membrane to maximize protein...manufacturer’s instructions for the membrane you are using. Dry nitrocellulose membranes are brittle, so proceed ... as normal! Stripping your membrane Alright, so you’ve dried your membrane and returned it to buffer, ...depend on your specific experiment. Remember, stripping your membrane will remove some of your sample —and...’ll want to: Rinse the membrane in water or fresh buffer. Cover the membrane in stripping solution and...a fume hood. Rinse the membrane in water or fresh buffer. Cover the membrane in stripping solution and...you need to start a whole new blot? Never fear: membrane stripping is here! Rather than start over, you...

  11. Human Germline Editing Using CRISPR

    Type
    Blog Post
    Published
    Aug. 10, 2017, 2:19 p.m.
    ...off-target editing sites in the embryos, as well as whole exome sequencing of embryo derived-ES cells.They also...editing between iPS cells and embryos make a case for conducting research in embryos should our society decide...sequencing to a small percentage of edited embryos. Since the embryos produced were not being used to establish...-free embryos to only 60%? Unfortunately, given the differences between CRISPR repair in embryos and iPS...this paper. Any hint of CRISPR editing in human embryos has been met with a storm of media coverage. But... replication. Indeed, they observed that 41/42 embryos were non-mosaic at 3 days post fertilization. Since...MYBPC3 allele. Interestingly, they found that the embryos underwent repair not from the single-stranded oligonucleotide...

  12. Technique: Probe Phage Genomes for Host Binding Proteins

    Type
    Blog Post
    Published
    Sept. 29, 2016, 2:30 p.m.
    ...nitrocellulose membranes and exposed to IPTG in order to induce protein expression. Cells on the membranes will ...orientation of each membrane on its plate before moving on. Then peel each membrane off the plate (saving...high salt.  To probe membranes with target bacterial cells, wash your membranes with PBST to remove salt... on the membrane to bind their target cells, pulling them out of solution. Wash your membranes well with... 20 Petri dish-sized circles of nitrocellulose membrane and press each gently down onto a plate of colonies...regrow the lifted colonies overnight), flip the membrane over and place it colony-side up onto a fresh ...plasmid selection. Remove air bubbles between the membrane and the agar using forceps. Several protein induction...

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

    Type
    Blog Post
    Published
    Sept. 26, 2024, 1:15 p.m.
    ...multicomponent assembly, as fragments with overlapping sequence homology can be assembled in a unique order...multicomponent assembly have 5′ or 3′ sequence homology to each other, they may be assembled incorrectly.... one option is to perform a hierarchical assembly, assembling fragments in multiple steps to avoid using...Golden Gate assembly, may also be beneficial. SLIC is most often compared to Gibson assembly, a cloning...required for Gibson assembly. SLIC is a standardized method for multi-fragment DNA assembly, and its low cost... by Mary Gearing in December 2015 and was updated by Emily P. Bentley in September 2024.  References ... cheap, standardized, and rapid multi-part DNA assembly method. Read on to learn how to use it in your...

  14. CRISPR 101: Multiplex Expression of gRNAs

    Type
    Blog Post
    Published
    Sept. 10, 2020, 11:45 a.m.
    ...to use some assembly methods such as Golden Gate or Gibson assembly. Golden Gate Assembly of gRNAs Golden...Golden Gate/Gibson Assembly Multiplexing Plasmids: These plasmids allow you to assemble 2-4 gRNAs through...gRNAs. PTGs are assembled into a wt Cas9-containing vector using Golden Gate assembly, and up to 8 gRNAs...Multiplex Plasmid: Two gRNAs can be assembled using Gibson Assembly or SLIC cloning. gRNAs are expressed...Bullock lab, and gRNAs can be inserted using Gibson Assembly or SLIC cloning methods. A BsaI-based E. coli ... multiplexed gRNAs with Golden Gate and Gibson assembly methods If you want to scale up the number of ...Golden Gate Assembly uses Type IIS restriction enzymes, which cleave outside of their recognition sequence...

  15. Plasmids 101: Golden Gate Cloning

    Type
    Blog Post
    Published
    Aug. 27, 2015, 2:30 p.m.
    ...can be used to assemble multiple fragments - up to 10 fragments are commonly assembled in a single reaction... Gibson assembly require 20-40 bp of homology at the ends of DNA fragments to specify assembly order, ...sequence homology cannot be assembled using this method, but can be assembled with Golden Gate. The popular...acids, but Golden Gate assembly can be designed to be scarless. Golden Gate assembly is also less expensive...recognition sequence, they can be customized to direct assembly of DNA fragments. When designed correctly, the...sites with complementary overhangs that direct assembly of the final ligation product. As shown below,...higher number of potential clones. Golden Gate assembly has a few advantages over other cloning methods...

  16. Plasmids 101: Modular Cloning

    Type
    Blog Post
    Published
    March 12, 2024, 1:15 p.m.
    ...organization scheme for multi-part DNA assembly. Simply put, it assembles individual DNA components into larger...MoClo-compatible vectors. Level 1: Assembly of multiple Level 0 parts into TUs. Level 2: Assembly of multiple Level 1...IIS restriction enzyme and a ligase are used to assemble multiple DNA fragments together in a one-tube ... Fig 1. MoClo enables individual parts to be assembled into larger functional units which are transcribed... Understanding how individual parts can be assembled into TUs is key to understanding MoClo. By a similar...Construction of multigene constructs, through multi-TU assembly,happens via three steps: Level 0: Cloning of ...multigene constructs. Figure 2: The three assembly levels of MoClo. Image courtesy of Rob Hurt. ...

  17. 22 Hot Plasmid Technologies from 2014

    Type
    Blog Post
    Published
    Jan. 6, 2015, 5:21 p.m.
    ...modules. In the first assembly step, compatible Level 0 vectors are directionally assembled into a Level 1 vector...of Level 1 assembly if necessary. Combining multiple Level 2 vectors in the final assembly step permits...structural and spectral properties of two of the family members – one with an unprecedentedly-high brightness, ...relies on several observations: Rapamycin is a membrane-permeable pharmacological agent that can rapidly...extraneous proteins bound to its outer mitochondrial membrane. Sequestration is accomplished by knocking down...protein with a FKBP domain and a mitochondrial outer membrane protein with a FRB domain (MitoTRAP). Rapamycin...., J Cell Sci 2013 May 1;126(Pt 9):2102-13. Assemble multiple component plasmids from building blocks...

  18. Starter guide to induced pluripotent stem cells (iPSCs) part 1:  A renaissance in regenerative medicine

    Type
    Blog Post
    Published
    Oct. 30, 2018, 1:04 p.m.
    ... cells in an organism, including the embryonic and extraembryonic cell types. In mammalian development...generation does not require embryos, their use skirts issues surrounding the use of embryos in research. With all...Beckmann, and W. Wurfel, Non-embryo-destructive Extraction of Pluripotent Embryonic Stem Cells: Implications...-assisted derivation of human embryonic stem cell lines from IVF embryos after preimplantation genetic...totipotent cells. An example of pluripotent cells is embryonic stem cells (ESCs), which I discuss in detail below...into two broad types according to their source: Embryonic stem cells ESCs are pluripotent stem cells that... abnormal and/or supernumerary preimplantation embryos that are produced during in vitro fertilization...

  19. Is this the right place for me? 8 tactics for choosing a lab

    Type
    Blog Post
    Published
    Oct. 2, 2018, 12:56 p.m.
    ... PI helps lab members determine project "ownership" and author order PI lets lab members fight it out ...long list of written questions for the PI and lab members.  Make coffee or beer dates to talk to as many ... informative way of gathering data. Former lab members can give open, revealing information about the ...and lab head. While it’s good to talk to new lab members too, they may not have had experience writing, ...career opportunities with the lab head. Former lab members can give you a fuller picture. Consider talking...try to attend a lab meeting. Observe how the lab members treat one another (especially those low on the ...will work for you, ask questions like: Do lab members feel there are enough projects to go around? What...

  20. Advancing Biology with Zebrafish: Genetic Tools for Developmental Studies and More

    Type
    Blog Post
    Published
    Aug. 13, 2019, 12:58 p.m.
    ...zebrafish embryo develops outside of the mother, making them ideal for studying vertebrate embryogenesis. To...investigations into environmental pollutants and health, embryo growth, brain function, and disease development...illustrate some of the reasons that zebrafish have been embraced as a model organism, I’ll outline a few of the...quality genome sequence A high-quality sequence assembly of the zebrafish genome was published in 2013,... when and where genes are active in developing embryos are available. Additional analysis tools have been...head, eyes, and tail. Compared to the opaque mouse embryo, where similar processes occur over days inside...the zebrafish is an ideal system to observe embryogenesis live. The origins, divisions, and movements ...
Showing: 21 - 40 of 513 results