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We narrowed to 560 results for: mal.2

Showing: 141 - 160 of 560 results
  1. CRISPR-mediated Plant Base Editors

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    Blog Post
    ...satisfactorily accepts DNA as its substrate (see figure 2).          The artificially evolved adenosine deaminase...editing platforms for plant systems.  Figure 2: Plant base editor platforms and their molecular components...available for plant systems. Target-AID based (CBE-2)-  and rAPOBEC based (CBE-1)-  CBEs are successful...based CBEs are known to deaminate cytosine placed in 2-6 bp and 4-8 bp, respectively, of the protospacer....PMID: 27096365. PubMed Central PMCID: PMC4873371.  2. Nishida, Keiji, et al. "Targeted nucleotide editing...studies demonstrated successful base editing in mammals, but there is a lack of base editors for plant ...PAM). ABE7.10 can edit target 'A' if it lies in a small genomic window: at protospacer position 4-8 counting...
  2. Viral Vectors 101: AAV Variables That Matter

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    Blog Post
    ...testing your AAV.  Figure 2: Comparison of AAV serotypes 1, 2, 5, 6, 8, and 9 in two different ...) your experimental conditions and measurements; (2) the cells you’re targeting; (3) how much expression... Tropism and Axonal Transport of AAV Serotypes 1, 2, 5, 6, 8 and 9 in the Mouse Brain. PLOS ONE, 8(9),... Comparison of four promoters. Gene Therapy, 28(1–2), 56–74. https://doi.org/10.1038/s41434-020-0169-1...analyses of adeno-associated viral vector serotypes 1, 2, 5, 8 and 9 in marmoset, mouse and macaque cerebral...), but there are differences in tropism between animal species or even strains of the same species. What... to define high titer, then, is this: It’s the optimal number of viral particles per volume required to...
  3. How-to: 5 Steps to a Great Panel Discussion

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    Blog Post
    ... let the panelists introduce themselves. I do a 1-2 minute introduction. If you chose good panelists, ...take 5 minutes to introduce themselves and, voila, 1/2 of your time is gone with no interesting discussion...introductions. The moderator asks questions, calling on 1-2 panelist for each question in a way that elicits those...shift, they are checking out. If you can, plant 1-2 good questions with trusted audience members. A good...'t do it unless you can do it well" – even the smallest program. I don't mean have fancy food or a fantastic... put your panelists behind a table. It adds a formality and distance that prevents interaction with each...
  4. Fluorescent Proteins 101: Aptamer Fluorophores

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    Blog Post
    ... to DFHBI in the presence of that metabolite (Fig.2). Spinach eventually evolved into Spinach2, a more...PMID: 25713381. PubMed Central PMCID: PMC4364232. 2. Baker, Monya. “RNA imaging in situ”. Nature Methods...emerging environmental pollutants.” Front Chem. 2014; 2: 41. PubMed PMID: 25019067. PubMed Central PMCID: ...biosensors.” TrAC Trends in Analytical Chemistry 27(2):108-117 · February 2008. 11. Svensen, Nina and Jaffrey...these small ligands. References 1. Ma, Hanhui, et al. “Multicolor CRISPR labeling of chromosomal loci...cleavage and an RNA aptamer that bound the compound malachite green (MG) to create a non-protein based visualization...Broccoli cassettes, thereby extending their use into mammalian cells. They’ve also dimerized Broccoli to further...
  5. Truncated gRNAs for Regulating Gene Expression

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    Blog Post
    ...the absence of genome editing (Fig. 2 and 3) (5, 3). Figure 2: Gene activation with nuclease-competent...shown to exhibit more limited activity than SpCas9 (2). In many cases this is due both to lower relative...PMID: 24076762. PubMed Central PMCID: PMC3844869. 2. Chari, Raj, et al. "Unraveling CRISPR-Cas9 genome...locus when complexed with an appropriately designed small RNA, or guide RNA (gRNA). The gRNA conventionally... need to generate new cell lines or transgenic animals expressing dCas9 as a means of modulating gene ...: 26344044. PubMed Central PMCID: PMC4666719. 4. Mali, Prashant, et al. "RNA-guided human genome engineering...
  6. Deep Dive: Statistical Tests (Comparisons)

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    Blog Post
    ... - spread of data; typically, normal (bell curve) or skewed (see Fig. 2). Assumptions – characteristics...levels of variance among data.     Fig. 2: Examples of data distribution profiles.   Parametric... positive is much higher than if you only look at 2 or 3 pairwise comparisons. Similar to family-wise ...statistical facets of reproducibility. Adv Physiol Educ. 40(2): 248-252 (2016). 0.1152/advan.00042.2016 Finch, W...Simulation Study. Front. Appl. Math. Stat. Volume 2 (2016). doi.org/10.3389/fams.2016.00002  ...calculated p values from smallest to largest and ranking them (1 being the smallest value). It calculates...   Parametric test assumptions: Distribution – Normal Variables – Independent Variance – Approximately...
  7. Tetbow: Bright Multicolor Labeling for Neuronal Tracing

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    Blog Post
    ...possible when each of the XFP genes is introduced at ~2 copies per cell per color, following a Poisson distribution...(prepared with Addgene #104110 - #104112) (Figure 2). We’ve also created constructs with containing chemical...AAV titer - The XFP genes have to be introduced at ~2 copies per cell per color to achieve the highest color...Then at your preferred time points, sacrifice the animals and fix the samples. When you use AAVs, it typically...typically takes a few weeks to achieve optimal expression of XFPs. Any longer and the cells may start to...to show morphological abnormalities due to the excessive amount of XFPs expressed. Then, clear the samples...suppressing transcription. It is critical to express a minimal amount of tTA to achieve highest expression levels...
  8. Viral Vectors 101: What is a Virus (and a Viral Vector)?

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    Blog Post
    ...developed around how they replicate (Figure 2). Figure 2: Baltimore replication classes. Image credit...safer viral vectors that can be used in BSL-1 or BSL-2 labs. Viral vectors are viruses that have been genetically...decide if they’re alive or not. Yet these simple, small particles have quite the outsized impact — and not...of viral vectors (which many researchers will informally refer to as viruses) are named after the viruses...
  9. AAVs in Retinal Gene Therapy

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    Blog Post
    ...therapy had fallen - plummeted really -  from grace 2 years prior with the death of Jesse Gelsinger in an... the whole field to a grinding stop and only now, 2 decades later, is it finally back in the limelight...the other hand, have broad tropism in the eye. AAV-2, the first identified serotype and the one used in...reading 1. FDA approves gene therapy for blindness 2. Gene Therapy emerges from disgrace to be the next..., including the RPE65 gene responsible for an autosomal recessive, severe, childhood-onset form of blindness...cloning of the RPE65 gene, a naturally occurring animal model, the RPE65−/− dog, was characterized and ...expression in non-dividing cells because they remain in episomal form in the cell’s nucleus. But since nothing...
  10. Hot Plasmids: Spring 2025

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    Blog Post
    ...cell-attached recordings in primary visual cortex (V1) layer 2/3 (L2/3). B) Fluorescence from axonal boutons of neurons... generation and stable cell line creation (Figure 2). Looking for more? Explore our empty and EGFP retroviral...Lentiviral backbone plasmids here! Figure 2: Addgene cloned EGFP into pAG Lenti CMV N-HA Puro ...Glypicans are proteoglycans composed of a protein core, 2–4 glycosaminoglycans (GAG), and are (typically) tethered...either the optogenetic activator channelrhodopsin-2 or fluorescent reporter dTomato under the control ...but it is challenging to monitor because only a small number of glutamate molecules are released in each...CMV promoter drives robust gene expression in mammalian cells. Flexible tagging: Choose untagged or add...
  11. CRISPR 101: Making a Knock-In Cell Line

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    Blog Post
    ...suggestions. Disable the other repair mechanisms Mammalian cells have 2 primary repair mechanisms besides HR - ... However, if you have a larger knock-in (200 bp – 2 kb), a dsDNA donor will need to be used due to synthesis...accidentally change your protein of interest.   Fig. 2: Stop re-cutting with PAM and guide RNA disrupting.... Com., 8(2024), (2017). 10.1038/s41467-017-01836-2 Charpentier, M., Khedher, A. H. Y., Menerot, S., Brion...dominant homology-directed repair (HDR) pathway in mammalian cells, but a less frequent DNA repair mechanism... HDR events compete with NHEJ-mediated edits of small insertions and deletions.   Start your knock-in...advances in CRISPR/Cas9-mediated knock-ins in mammalian cells. J Biotechnol., 16(4): 387-390 (2020). 10.1016...
  12. DNA Purification Without a Kit

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    Blog Post
    ...alkaline lysis plasmid miniprep Starting material: 2 mL bacterial culture Product: plasmid DNA This kit-free...protocol: 1) it solubilizes both DNA and agarose, and 2) it helps DNA stick to the glass. After binding DNA... had a similar level of sensitivity. Figure 2: Steps to purify DNA using a cellulose dipstick. Image...Academy of Sciences of the United States of America, 76 2, 615-9 . https://doi.org/10.1073/pnas.76.2.615  Zhou... columns, it’s bound to glass syringe filters. Normally DNA does not bind silica or glass, but the addition... Starting material: plant, microbe, blood, or mammalian cells or tissue Product: total nucleic acids While...purify DNA and RNA from plants, microbes, blood or mammalian cells in 30 seconds or less without using a pipette...
  13. Addgene is Expanding Our Viral Vector Service!

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    Blog Post
    ...Request review: 1–2 days Prep and QC completed: 6–8 weeks Average shipping time: 1–2 days (USA); 3–4 days... our production process. This process will take 1–2 days, and we anticipate approving the vast majority...be available for Packaged on Request service. A small subset of AAV plasmids will have technical or legal...
  14. Tips for a 1st time AAV user (by a Rookie AAV user)

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    Blog Post
    ...then packaged into AAV’s protein shell, or capsid; 2) the pHelper plasmid which expresses adenovirus genes...takes ~3 hours to complete: 1 hours hands-on time and 2 hours for the qPCR run and data analysis. Refer to...quantification of adeno-associated virus serotype 2-derived inverted terminal repeat sequences. Human ...therapy methods, 23 1, 18-28. PubMed PMID: 22428977. 2. Choi, V.W., Asokan, A., Haberman, R.A., & Samulski...buffer exchanged virus, remember to make one or two small aliquots to use for qPCR titering. This helps avoid...multiplicity of infections (MOIs), to determine the optimal dose of AAV for my cells of interest. Every batch...makes AAV a versatile tool for gene expression in mammals Use the PEI calculator for planning AAV packaging...
  15. Light Sheet Fluorescence Microscopy

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    Blog Post
    ...Carballosa, et al, (2015) eNeuro, March/April 2015, 2(2) e0001-15.2015. Pubmed. Resources: http://openspim.org...orthogonal-plane fluorescence optical sectioning (OPFOS) (2). Arne Voie, David Burns and Francis Spelman focused...in LSFM. In LSFM the laser light sheet, typically 2-6  microns, illuminates only one thin plane of the...can be used with 3DISCO to image non-transgenic animals such as rats (17).  In addition, the use of viruses...over labeling methods as compared to transgenic animals (17).  These viral plasmids are available through...relationship of the central nervous system under normal and diseased conditions.  Thank you to our guest...
  16. Plasmids 101: Gateway Cloning

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    Blog Post
    ...is excised from the donor vector.   Figure 2: The Gateway system adopts phage integration into ...our website to search for your favorite gene! STEP 2: Generate an Expression Clone When making the expression...expression construct in only 1 day, as opposed to 2+ days with traditional restriction and ligation cloning...Clon Transgen 4:138. doi:10.4172/2168-9849.1000138 2. Hartley JL. Use of the Gateway System for Protein...lentiviral expression of the human KRAS gene in mammalian cells. STEP 1: Generate an Entry Clone There are...expression level, and experimental purpose. For mammalian lentiviral expression, we could use a vector like...and is available for all kind of organisms from mammals to E. coli. Glossary of Gateway cloning vectors...
  17. A Practical Guide to Optimizing AAV DIO and FLEx Vector Expression

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    Blog Post
    ...one of lox2272 sites will now be sandwiched between 2 loxp sites and is excised by Cre (Figure 1). This ...flank the transgenes (non-homologous pairs) (Figure 2.). They found that almost all off-target expression...exercise caution when using them.    Figure 2. Schematic diagram showing the mechanism of spontaneous... Tropism and Axonal Transport of AAV Serotypes 1, 2, 5, 6, 8 and 9 in the Mouse Brain. PLoS ONE 8:e76310... Pseudotyped with Viral Capsids from Serotypes 1, 2, and 5 Display Differential Efficiency and Cell Tropism... with in vivo experiments to determine the optimal/minimal injection titer and volume needed to achieve... now be able to make smaller adjustments to a set of injections into your animal model. For example, in...
  18. Crowdfight, a Platform to Boost Scientific Collaboration During COVID-19 and Beyond

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    Blog Post
    ...antibodies from an Andean mammal called alpaca could neutralize the SARS-CoV-2 virus. But while the early...receiving dozens of requests every day.    Figure 2: When a researcher needs a collaborator for a specific...Crowdfight will: 1) Find an expert with the right skill; 2) Confirm the expert’s suitability and availability...In the example above, for example, we fostered a formal scientific collaboration between two research groups...transient partnerships where a researcher makes a small but crucial contribution to someone else’s project...find the right expert and the lack of credit for small contributions. We strive to eliminate these two ...
  19. Optimizing Donor DNA for Enhanced CRISPR Genome Editing

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    Blog Post
    ...mechanism of action are presented in Figure 2. Figure 2: Single-stranded donor DNA interaction with...Nature biotechnology (2016). PubMed PMID: 26789497.  2. Lin, Steven, et al. "Enhanced homology-directed human...PAM-distal side of the break and 91bp on the PAM-proximal side, consistently supported higher frequencies...attained without any of the error-prone repair that normally accompanies Cas9 cutting. We still don’t know ...
  20. Important Considerations in Optogenetics Behavioral Experiments

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    Blog Post
    ...of “reward”), then the animal will repeatedly nose-poke at the active hole [1, 2].    Place preference/...spend most of its times in the opposite chamber) [2]. Laser activation is usually controlled automatically...two different ways 1) your hypothesis is wrong or 2) there is some problem with the technical implementation...PMID: 21716290. Pubmed Central PMCID: PMC3775282. 2. McDevitt, Ross A., et al. "Serotonergic versus nonserotonergic...approximation of reward or the sense of pleasure that the animal perceives through taking a drug. The ideal behaviors...distinguished visually through different patterns and the animal only receives stimulation in one of the two chambers... image below). If a circuit is reinforcing, the animal will prefer to spend most of its time in the chamber...
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