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...beginning Let’s take a quick flash back to 2004. “Shrek 2” was the most popular movie in theaters, the Razr ...amazing years in front of us. So in our last celebratory moment, we wanted to walk through some of our...Facebook and Gmail, were launched. And Melina Fan, a cell biology graduate student, was frustrated by the ...to receive the Massachusetts Nonprofit Network Excellence Award for our electronic MTA system. We also ...now our Sr. Director of Production) pie-fully celebrating Addgene's 10 year anniversary.   Expanding...

...method 2): Method 1 Method 2 $$T = {N*F*D\over V_T}$$ Where: T = Titer, TU/mL N = Number of cells transduced...Workflow Timeline Day 0: Seed 293T cells Day 1: Transduce cells Day 2 (am): Remove media, replace with ...,000 cells into 14 mL of DMEM complete. Mix well by pipetting or inverting. Aliquot 2 mL of cell suspension...fluorescent cells Equipment Class II, Type A2 Biological Safety Cabinet 0.5–10 µL single channel pipette 2–20 ...Lentivirus is generally considered biosafety level 2+. Please ensure that you are in compliance with your... 200–1000 µL single channel pipette Ice bucket CO 2 incubator Pipet controller Hazardous waste container...added to 150,000 cells resulted in 25% fluorescent cells, then the titer is: (150,000 cells x 0.25 fluorescent...

...localizations. Figure 2: Split-wrmScarlet labeling proteins with different subcellular locations. Image from...determine cell cycle length by examining the ratio of blue to red cells. Cells undergoing rapid cell cycles...engineered C. elegans cell lines to express wrmScarlet1-10 unattached to any other cellular protein. They used...’s difficult to observe the cell cycle in vivo, particularly if the cells are migratory or in deep tissues... BaF3 cells were transduced with H2B-FT virus and grown in varying concentrations of IL-3. Cells grown...proportion of blue fluorescence, indicating cell proliferation. BaF3 cells maintained in media without IL-3 show...H2B-FT consistently predicted the cell cycle speed across these different cell types. In one example, H2B-FT...

... already have an end product in mind, steps 1 and 2 will generally be straightforward. Likewise for step...Calcium phosphate Cells Transformed cell lines Transformed cell lines Transformed cell lines Cargo Nucleic...identify and enrich positive cells or a selection marker to generate stable cell lines. Transient or stable...and enrich positive cells. Likely contains a selection marker to generate stable cell lines. Packaging and...wide variety of mammalian cell lines. Useful for difficult to transfect cell types and can be used in ...protein are degraded within the cell.   Delivery methods for mammalian cell lines As mentioned above, the...components into your target cells. Delivery of these components into mammalian cell lines is quite broad and...

... tabular HTML formatted output. Surprisingly only 2 tools provide FASTA output. A few notable tools allow...Nature biotechnology(2014). PubMed PMID: 24880488. 2. Hsu, Patrick D., et al. "DNA targeting specificity...the research community. I’ve likened it to the celebration surrounding the piñata. From the perspective ...

... Cure for HIV/AIDS. Int J Mol Sci. 2023 Jan 13;24(2):1563. doi: 10.3390/ijms24021563 Resources on Addgene.org...Cas9 in Intestinal Stem Cell Organoids of Cystic Fibrosis Patients." Cell Stem Cell. 13, 653-658 (2013). ...patient’s own cells that have been modified ex vivo, previously edited healthy donor cells can be delivered...Genetic Disease in Mouse Via Use of CRISPR/Cas9." Cell Stem Cell. 13, 659-662 (2013). Gerald Schwank et al. ...on editing animal models of disease and cultured cells. For example, in 2013, Jinsong Li and colleagues...applied CRISPR to disease correction in adult stem cells isolated from two patients with cystic fibrosis ...delivery directly to the patient. Patient-derived cells can alternatively be harvested, edited ex vivo, ...

...protein from cells or tissue samples. Equipment Microcentrifuge 0.5–10 µL single channel pipette 2–20 µL single...transfer, block, incubate with primary antibody Day 2: Incubate with secondary antibody Video Watch this...Heat block Mini gel tank chamber Power supply iBlot 2 Gel Transfer Device Roller Spatula Platform shaker...running buffer Prestained protein ladder Ethanol iBlot 2 PVDF Mini Stack, Thermo Fisher IB24002 20X TBS Tween...immediately or store at -80 °C until ready to use. Section 2: Determine the total protein concentration and prepare...in deionized water. To prepare 20% ethanol, dilute 2 mL of ethanol into 8 mL of deionized water and mix...the transfer sandwich as follows: Unseal the iBlot 2 PVDF Mini transfer stack. Set the Top Stack to one...

...C-terminus of human codon-optimized  cryptochrome 2 (CRY2) from Arabidopsis thaliana. When exposed to ...illumination of neighboring cells evokes action potentials (APs) in patched cells expressing wild type CoChR...techniques for live-cell imaging of the dynamic changes in biochemical activity within the cell. Their Fluorescence...distribution of clusters without accumulation in subcellular compartments such as nuclear speckles. Furthermore...OptoSTIM1), caused two-fold faster changes in intracellular Ca2+ levels than the original version containing...CRY2clust should prove a useful tool to further probe cellular function. The CRY2clust Plasmid can be found here...28646204. soCoChR: A novel opsin that enables single-cell optogenetics Article contributed by Meghan Rego ...

...dimerization-dependent protein interactions. FEBS letters, 591 2, 415-424. PubMed PMID: 28032891. This is a different... expressed in cells via plasmids or by the creation of stable cell lines and these cells are then grown... complex. Not performed in a native cell context. For AP-MS, cells are lysed before the bait protein is...and interacting proteins in mammalian cells. The Journal of cell biology. PubMed PMID: 22412018. PubMed...against PPIs that aren't stable outside the native cell context. The Split-BioID method Enter Split-BioID...tagging of proteins in both BioID or Split-BioID, cells are lysed, protein extracted, and labeled protein...proteins that interact with the bait in a native cell contact. Other PPI methods may require protein interactions...

...divided by the off-target activity. Figure 2: Specificity is the measure of off-target activity...CRISPR-Cas12b for mammalian genome engineering." Cell discovery 4.1 (2018): 63. PubMed PMID: 30510770....

...still depolarize neurons at lower MOIs. Figure 2: ChRgers are delivered by intravenous injection into... channels in living cells. Multiple properties of a channelrhodopsin, such as cell localization, kinetics...

...main decisions to make: 1. Which modification? and 2. Which viral vector should be used? Modifying gene...Different AAV serotypes have preferences for specific cell types. For example, AAV1 and AAV9 serotypes have...most cases with VSV-G that generally mediates broad cell tropism and has a high percentage of neuronal targeting...

...Components." Cell (2016). PubMed PMID: 27160350. Find Plasmids from the publication at Addgene 2. Green, ...circuits to be deployed out of the laboratory in a cell-free and biosafe format that was stable for up to...possible and submitted our manuscript to the journal Cell just six weeks later. The Zika publication timeline...of Toronto. His research is focused on developing cell-free synthetic biology applications for human health...de-novo-designed regulators of gene expression." Cell 159.4 (2014): 925-939. PubMed PMID: 25417166. PubMed...Keith, et al. "Paper-based synthetic gene networks." Cell 159.4 (2014): 940-954. PubMed PMID: 25417167. PubMed...

...Workflow Timeline Day 1: Seed cells Day 2: Transfect cells Day 3-6: Feed cells Day 7: Harvest antibody Equipment...Pro-Tip Do not use cells that are over 30 passages. Section 2: Transfection Check the cell density and viability... (EBNA). Safety Warnings HEK293 cells are considered biosafety level 2. Please ensure that you are in ...compatible with 50 mL conical tubes Automated cell counter 37 °C, 5% CO 2 incubator with shaking platform set to...density of 0.9 x 10 6 cells/mL in a 500 mL vented flask.Incubate in a 37 °C, 5% CO 2 incubator on a shaking ...Pro-Tip Culture should be between 1.5–2 x 10 6 cells/mL with >95% viability to proceed with transfection...250 mg Benzamidine 25 mL Aprotinin saline solution (2 mg/mL) Mix well and sterilize through a 0.2 µm PES...

...unc- 119 + selection." MicroPublication 1 (2018): 2–3. Wang, Han, et al. "cGAL, a temperature-robust GAL4...currently doing this using two approaches: single-cell RNA-sequencing to identify neuronal class and deep...WDDD aims to acquire quantitative data on all the cell divisions of the C. elegans embryo when all essential...Wang et al., 2018).” With the split system, only cells that have both halves of cGAL can drive expression...

...systems to defend against both DNA and RNA viruses - 2 cas systems regulate at the DNA level and 1 at the...origin of cellular life. His lab has long hypothesized that life started with RNA and a simple cell membrane... circular RNA they have identified resulted in a cell migration defect. They have created a circRNA website...

...: PMC4353587. 2. Stephen, Andrew G., et al. "Dragging ras back in the ring." Cancer cell 25.3 (2014): ...molecular level, at the cellular level there is a universal theme - uncontrolled cellular proliferation. We ...cancerous cells Luckily, there are several safety mechanisms in place to protect us from rogue cells when ...process of programmed cell death, or apoptosis, is one such mechanism. When a cell or its genetic material... directly inhibit the ability of a cell to undergo programmed cell death while simultaneously stimulating...eliminate every cancerous cell. Even so, to pose the greatest threat, cancerous cells still need to successfully...universally-dividing behavior of cancer cells, attacking the cellular machinery necessary for division. This...

... 2008 Dec; 18(6): 617–623. Pubmed PMID 19349161.  2. Deshpande A, Bergami M, Ghanem A, Conzelmann KK, ...it first infects one cell (the “starter cell”). It then replicates within that cell, and nascent RABV cross...connections to the starter cell, RABV was modified to only infect user-defined starter cell types, as well as ...dictate infection of target cells through their interactions with target cell surface receptors (Callaway...Callaway 2008). Based on this, cell type specificity of the starter cell can be achieved by using EnvA-pseudotyped...studied biological processes, like how our stem cells are housed in specific locations and give rise to...Tracers Due to their ability to efficiently enter cells and deliver a variety of cargoes, genetically engineered...

...mL glass bottle: 4 g NaCl 4 g Tryptone 2 g Yeast Extract and dH 2 O to 400 mL Note: If your lab has pre-mixed...start 2 mL in a Falcon tube. For larger preps, you might want to use as much as a liter of LB in a 2 L Erlenmeyer...individual plasmid within a single bacterial cell (Figure 2). Large plasmids usually have a low copy number...indicated, the antibiotic powder can be dissolved in dH 2 0. Addgene recommends making 1000X stock solutions...determine if your plasmid is high or low copy. Figure 2: High versus low copy plasmids in bacteria. Created...number (approximately one or two copies per cell) and they need to grow for longer periods of time (approximately... can be present in large numbers, 50 or more per cell, and have a high copy number. High copy number plasmids...

... replication competent virus [usually HIV-1]; and 2) the potential for oncogenesis through insertional...of interest into cells. Unlike gamma-retroviruses that can only infect dividing cells, lentiviruses can...dividing and non-diving cells while retroviruses can only infect dividing cells. When choosing the appropriate...to ensure that the proper cell line is used; several common laboratory cell lines including 293 were immortalized...can infect dividing and non-dividing cells.  Addgene has an extensive collection of lentiviral plasmids...transfecting four different plasmids into the producer cells (two packaging plasmids, an envelope plasmid, and...appropriate gene delivery system, the specific target cell or tissue needs to be considered. Q2: Can I use...