...Citorik Plasmids here). In both cases, they used 1-2 CRISPR crRNAs targeting sequences found only in certain...resensitize antibiotic-resistant bacteria (Figure 2). The first phage introduced is lysogenic, integrating...machinery targeting 1) the given resistance gene and 2) a second lytic phage. Bacteria that receive this ...bacteria have previously flourished.   Figure 2: Two-phage strategies to resensitize bacteria to antibiotics...237163. Find plasmids from this paper at Addgene. 2. Bikard, David, et al. “Exploiting CRISPR-Cas nucleases...reach essentially every cell or else small pools of antibiotic resistant cells could repopulate the environment...strategies are nonspecific - they harm any bacterial cell without a resistance gene, allowing resistant bacteria...

...kinetics which are illustrated in figures 2 and 3.  Figure 2: Glutamate titration curves for the different...signals upon sensing glutamate using both 1-photon and 2-photon imaging.   Figure 1: 1P and 2P excitation...adapted from Aggarwal et al…, Supplementary Figure 2.   Improved trafficking and localization through... glutamate release from neurons and other brain cells in vivo. Glutamate plays a variety of roles in synaptic...sensor to the membrane and displays it on the extracellular side. In addition to the original PDGFR TMD,...promoter, FLEXed for expression in Cre-expressing cells hSynap: Human Synapsin-1 promoter. Good for neuronal...promoter, FLEXed for expression in Cre-expressing cells. hSynap-FLP: Synapsin-1 promoter, FLP-dependent ...

...Location: peritoneal cavity Gauge: 25–27 Volume: < 2–3 ml Skill required: intermediate Intramuscular Intramuscular...Location: back or hind legs Gauge: 25–27 Volume: < 2–3 ml (~1 ml per site) Skill required: beginner Intradermal...Intraperitoneal Scruffing Peritoneal cavity 25–27 < 2–3 mL Intermediate Intramuscular Mechanical restrainer...Back or hind legs; between skin and muscle 25–27 < 2–3 mL (~1 mL per site) Beginner Intradermal Anesthesia...Addgene blog Mouse Modeling Part 1 Mouse Modeling Part 2 Five Popular Model Organisms Additional resources ...different substances can be injected, including cells, drugs, DNA, viral vectors, and viruses. All researchers... injections are most often used when injecting a cell suspension to create xenograft models. Restraint...

...Currently available from the Kim lab are 2 presynaptic and 2 postsynaptic targeting mGRASP plasmids. Additionally... Robinson et al., Dev Cell 2010 Feb 16;18(2):324-31. Cheeseman et al., J Cell Sci 2013 May 1;126(Pt ... 2µg/ml of Doxycycline for 2 hours, and imaged on the Keyence BZ-9000 fluorescence microscope 8 hours ...promotes the formation of an isopeptide bond between 2 peptide tags, SpyTag and KTag. The group demonstrated... of three sets of cloning vectors (Level 0, 1, or 2) which can be utilized in three successive assembly...1 modules can be similarly assembled into a Level 2 vector, thus forming a functional genetic circuit....circuit. Flexibility has been built into the Level 2 vectors to allow for additional iterations of Level 1 assembly...

...purify IVT sgRNA in the lab. Figure 2: Cas9 RNP complexed with 2-part cr:tracrRNA tags genes more effectively...is then transfected into stem cells. Cells are allowed to recover for 2-5 days and then analyzed for tagging...transfect and let cells recover for 2-5 days.Note: We use the Nucleofection method for delivery of csRNP... knock-in efficiency (<2% positive by ICC for the tag) or do not see any cells positive for tag insertion...stem cells. Development 144: 635-648. PubMed PMID: 28096221. PubMed Central PMCID: PMC5312033. 2. Dewari...IVT sgRNA) approach (Dewari et al. 2018 and Figure 2). Not only is the cr:tracrRNA approach highly efficient...transfected cells, we count the number of tag-positive cells (tag ICC) as a percentage of total cells in the...

...of conventional gene targeting is lowered to about 2-3 months. But certain models remain more difficult...included in the final ssDNA template. Figure 2: Overview of ivTRT to generate an ssDNA repair template... floxed conditional allele requires you to target 2 loxP sites to intronic regions 0.5 - 0.8 kb apart....Typically, Easi-CRISPR works best with insertions of 2 kb or less. Luckily, most of the commonly used cassettes... induction systems (ttA or rtTA) are between 1 to 2 kb in length. There are plenty of Addgene plasmid ...create the ssDNA construct as described in Figure 2.  You can also use Addgene plasmids to purify Cas9...desired mutation in mouse ES cells, select for the mutation and inject the ES cells into a mouse embryo to ...

...either SARS-CoV-2, Adenovirus type 41 (AdV-41), or Adenovirus-Associated Virus type 2 (AAV2) – or some... was either 1) a physiological effect of SARS-CoV-2 toward destabilizing one’s natural immune response...response to Adenovirus (and/or to its partner, AAV) or 2) a sociological effect of the COVID-19 lockdowns causing...… Chiu, C. Y. (2023). Adeno-associated virus type 2 in US children with acute severe hepatitis. Nature... AdVs is dependent on modulation of the host cell’s cell cycle; inhibition of the innate immune system... in the producer cells where there is E1 and E3 gene complementation. In target cells that are infected...hexon), as well as other intracellularly-exposed proteins and downstream cellular events, all recruit strong...

..., AAV2/8 has a type 2 ITR and a type 8 serotype. Almost all vectors contain type 2 ITRs, which comes from...terminally differentiated, non-dividing cells.   Figure 2: DNA rescue and transduction of a conventional...quantitative PCR-based method for the titration of AAV-2 vector stocks."Molecular Therapy 6.2 (2002): 272. ...Time to expression AAVs have to infect cells, hijack host cell machinery, and synthesize a second strand...that can be used to express genes of interest in cell and animal models. AAVs are non-pathogenic, do not...be specifically targeted to a number of different cell types even when systemically administered in an ...ranging from transient gene expression in a particular cell type to CRISPR genome editing, optogenetics, and...

... Multiple Introns.” Plant Communications, vol. 2, no. 2, Elsevier BV, Mar. 2021, p. 100135. Crossref, ...Constructs.” PLoS ONE, edited by Jean Peccoud, vol. 6, no. 2, Public Library of Science (PLoS), 18 Feb. 2011, p... vol. 5, no. 10, American Chemical Society (ACS), 2 May 2016, pp. 1059–69. Crossref, https://doi.org/10.1021...of Plant Genomes.” The Plant Genome, vol. 16, no. 2, Wiley, 9 Mar. 2023. Crossref, https://doi.org/10.1002...Crossref, https://doi.org/10.1186/s12870-020-02388-2. Stuttmann, Johannes, et al. “Highly Efficient Multiplex...Crossref, https://doi.org/10.1038/s41598-019-46171-2. Resources on Addgene.org Modular Cloning (MoClo...can be used in bacterial and cell-free expression systems, mammalian cells, yeast, flies, and even plants...

...place. Then plasmids are cured from the cell. Steps 1-1 and 1-2 can be done simultaneously. Image from ...1) replaced the promoter of gRNA-pMB1 with PrhaB, 2) changed the replicon of pCas into a non-temperature-sensitive... pEcCas/pEcgRNA system in 4 E. coli K-12 strains, 2 E. coli B strains, 1 E. coli W strain, and 1 Tatumella...MUCICAT better, it is faster. Using MUCICAT only needs 2 newly constructed plasmids (pDonor and pQCascade) ...rounds of transformation in 30 days. Figure 2: (A) MUCICAT plasmids for multicopy integration. (...construct and then introduce both plasmids into the cell. The edit in the chromosome can now take place. .... After editing, pTargetF can be cured from the cell by inducing expression of the sgRNA that targets ...

...//doi.org/10.1002/1096-8628(200022)97:2<147::aid-ajmg6>3.0.co;2-o Baker SA, Chen L, Wilkins AD, Yu P, ...Caused by a mutation in the methyl-CpG binding protein 2 (MECP2) gene, Rett Syndrome is a rare, progressive...X-linked MECP2, encoding methyl-CpG-binding protein 2. Nat Genet 23:185–188 . https://doi.org/10.1038/13810... (2000) Rett syndrome: Methyl-CpG-binding protein 2 mutations and phenotype-genotype correlations. Am ...Syndrome and Related Disorders. Cell 152:984–996 . https://doi.org/10.1016/j.cell.2013.01.038 Guy J, Gan J, ...Programmable RNA Editing. Cell Reports 32:107878 . https://doi.org/10.1016/j.celrep.2020.107878 Sinnett SE...deliver the precise amount of protein to each brain cell to restore physiological levels. Much research is...

...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 is... 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... where many different cell types, or even different phenotypes of the same cell type, are intermingled...postsynaptic cells when used at very high titers (Zingg et al., 2017), which can lead to cells in far away...

... recombination at the cellular level in the mouse. 2003 PubMed PMID: 12665802. 2. Branda, CS and Dymecki...2008. A FLEX switch targets Channelrhodopsin-2 to multiple cell types for imaging and long-range circuit ...conditional knock-in cassette. As shown in Figure 2, the cassette should contain a reporter DNA sequence...a targeted neuronal population.    Figure 2 (modified from Schnutgen et al. Nat Biotech 2003):...delivered using AAV injection, the majority of the cells surrounding the injection site will become infected... ensure that the reporter remains silent until a cell or tissue-specific Cre is provided. Since the FLEx...used to study the physiology or behavior of certain cell populations.  Acknowledgement:Through a partnership...

...for retrograde transport has been found for AAV1, -2, -5, -7, -8 (Taymans et al., 2007), AAV1 (Hollis et... tropism and axonal transport of AAV serotypes 1, 2, 5, 6, 8 and 9 in the mouse brain. PLoS One 8:e76310...reveal novel hippocampal CA2 circuits. Nat Neurosci 17(2), 269–279. PubMed PMID: 24336151. PubMed Central PMCID... Mechanisms of Motility and Regulation. Neuron 84(2), 292–309. PubMed PMID: 25374356. PubMed Central PMCID...transduction efficiency of recombinant AAV serotypes 1, 2, 5 and 8 in the rat nigrostriatal system. J Neurochem...analysis of adeno-associated viral vector serotypes 1, 2, 5, 7 and 8 in mouse brain. Hum Gene Ther 18, 195–...retrograde access to projection neurons. Neuron 92(2), 372–382. PubMed PMID: 27720486. PubMed Central PMCID...

... this problem? (2-3 sentences) What will be the focus of your first grant? (1-2 sentences) ...of scientific success is publications and grants. 2. Write succinct and easy to understand documents A...consideration. 3. Present an easy to follow seminar See item 2. Attendees will include grad students (that are solicited...people would agree is important to understand. (1-2 sentences). For example: Distinguishing correctly ...patterning of cells and tissues is fundamental to development. I'm interested in how cells find their way...competitive CV You don't necessarily need a Nature/Cell/Science paper. You do need multiple first/corresponding... optimization of fluorescent proteins,  and live cell imaging approaches. Erik is also an avid long distance...

... Opto-Cre-Vvd is fast and can cut in as little as 2 hours.  Sheets, MB, et al., ACS Synth Biol. 2020....they investigated three Casɸ orthologs, Casɸ-1, Casɸ-2, and Casɸ-3. This system is notable for several reasons...a minimal PAM requirement. For instance, for Casɸ-2 the PAM sequence is 5’-TBN-3’ (where B is G, T, or...deposited by Leopold Parts. This library delivers 2 randomly paired guides per construct and allows a ...fluorescence-activated cell sorting (FACS) helps researchers sift through thousands of cells to identify cells exhibiting...target single cells. Now, Francois St-Pierre’s lab developed a new form of FACS-based cell screening, Single-cell...individual cells with unique spatiotemporal phenotypes from large heterogeneous cultures.  HeLa cells expressed...

...guide expression and dsDNA breaks. Figure 2: Non-targeting vs. safe-targeting guides. The genome-wide...target all protein-coding genes present in the genome; 2) non-targeting guides (red), which target no sequence...guides that had zero mismatch off-targets. Guides with 2-bp mismatch off-targets were only toxic if they had...tolerated than mismatches more distal to the PAM, and 2) guides with high GC content have greater off-target...PMID: 28474669. Pubmed Central PMCID: PMC5424143. 2. Tsai, Shengdar Q., et al. "GUIDE-seq enables genome-wide...delivered as a pooled library via a lentiviral vector to cell lines that either stably expressed Cas9 or that ...almost all genes involved in the production of a cell surface glycan that’s required for ricin uptake....

...NGG)  Editing window ~2 nt  85175  pBK-EE-BE3  SpCas9 (NGG)  Editing window ~2 nt  85176  pBK-YE2-...quantum yield of 0.54) and mScarlet-H with M164H (2-fold improvement in photostability compared to mScarlet...SpCas9 base editors with editing windows as small as 1-2 nucleotides! To reduce off-target effects associated...pBK-YE2-BE3  SpCas9 (NGG)  Editing window ~2 nt  85177  pBK-YEE-BE3  SpCas9 (NGG)  Lower on-target activity...activity than BE3; editing window ~1-2 nt  87438  pET42b-HF-BE3  HF-Cas9 (NGG)  Very low off-target activity...Ladders Are Awesome Tools: They are comprised of 2 plasmids, pPSU1 and pPSU2, that can be amplified affordably...libraries The Gross Lab at UCSF recently deposited 2 Bacillus subtilis libraries with Addgene – the B. ...

...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...hijacking the machinery of the cells they infect. Once they enter a cell, they treat their viral genome...genome as a “payload” that is delivered to the cell. The cell then uses its own machinery to replicate the...replication process whereby one cell copies itself and “splits” into two cells. Viral vectors Viruses are ...virus. From one, come many After a virion infects a cell, the single particle creates many copies of itself...millions of new copies, which are released from the cell like baby spiders from an egg sac. (Okay, some enveloped...

.... The most common options are 4 °C overnight or 1–2 hours at room temperature (RT). Most people choose...overnight at 4 °C and their secondary antibody for 1–2 hrs at room temperature, which allows them to reduce...Tris-glycine 6–400 kDa Tris-glycine 100 V, 1–2 hours Easy and cheap to handcast Short shelf-life...–40 kDa Tris-tricine 30 V, 1 hour or 100 V, 1–2 hours Good separation, quality, and stability ...separation of proteins of different sizes.  Table 2: Recommended gel percentages for various protein sizes...are consistent and stable at room temperature for 1–2 years and are available in formulas specific to your...response over a broad dynamic range that typically spans 2–5 orders of magnitude, which includes a wide dynamic...