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...of translation 2-10 ug/mL G418/Geneticin neo HeLa, NIH3T3, CHO, 293HEK, Jurkat T cells Blocks polypeptide...transfected cells may be considered an entirely new cell line from that of the original parental cells. Positive...cultured mammalian cells. Of course, these mammalian vectors must be compatible with the cell type they are...bacterial cells); however, the techniques and reagents vary. Plasmid transfection into mammalian cells is fairly...expression levels in the cells. Ideally, the chosen reporter is unique to the cell, is expressed from the...components expressed in trans within the cell for effective replication. Cell lines expressing the Epstein–Barr...mammalian cells To achieve stable transfection, there should be a selective pressure to force cells to incorporate...

...differentiation.   Fig. 2: Single cell RNA-seq clustering of cells transduced with the TF pooled...human embryonic stem cells. Transduced stem cells were differentiated and single cell RNA-seq was performed...transduced human embryonic stem cells with the viral TF library, with each cell receiving only 1 TF expression...construct. Cells were cultured following a differentiation protocol before performing single-cell RNA sequencing... 206 cells per TF ORF. From this large sequencing endeavor, a map of possible TF-induced cellular states... clusters of individual cells along with color coded nominated reference cell types.  (Adapted from Joung...delivered to each cell, future applications could deliver multiple TFs to each cell, allowing for combinatorial...

...enrich the microvesicles containing AAVs (Figure 2). Since the development of the exo-AAV isolation protocol...the producer cells and purification protocols often describe a process that begins with cell lysis to release...particles is able to infect more cells (as demonstrated in different cellular environments such as retina ... steps to separate cell culture supernatant containing exo-AVVs from producer cells, and then to enrich...Exosomal vesicles secreted from producer cells also contain cellular macromolecules (e.g. proteins, nucleic...effectively target less accessible cells, such as brain tumor stromal cells in a mouse model of glioblastoma...Standard AAV vectors are generated with a producer cell line like the widely used 293T. During vector production...

...is the most charged, with 5 negatively charged and 2 positively charged amino acids. FLAG tag has been .... This tag is not suitable for use in apoptotic cells as Caspase3/7 both cleave after the DVPD sequence...fluorescent marker. The GFP tag is ideal for live cell imaging, FRET, flow cytometry, or immunofluorescence...

...yourself greater chances for success.  Build a team of 2 or 3 Don’t go it alone.  You’ll find that no matter...would rather fund excellent people with mediocre ideas than mediocre people with excellent ideas. I am lucky...

...incorporation of biosensors, protein evolution lineages, 2-photon spectra, more elaborate spectrum analysis tools...  There are many online guides – including an excellent series of posts by Joachim Goedhart on the Addgene...Associate at Harvard Medical School. He manages the Cell Biology Microscopy Facility, specializing in advanced...

...create a recombinant antibody.     Figure 2: Changes to the heavy chain or light chain genes within...isolating the B cells from an immunized animal, those B cells are fused to myeloma cells at a 1:1 ratio...fusion between an antibody-producing B cell and a myeloma cell (National Research Council (US) Committee...immortal cell population that will continue to produce the specific antibody that the original B cell produced... selects against unfused myeloma cells and antibody-producing B cells that cannot replicate, meaning that...monoclonal antibodies are derived from a single B cell clone. One common way of producing monoclonal antibodies...with BioRender.com.   The antibody-producing B cells that are used to make hybridomas come from animals...

...library was used to transduce T helper type 2 (Th2) cells from mice that constitutively express Cas9 and...genome-wide interrogation of the genes required for cellular processes. For a successful screen, it is necessary... on the method used to introduce the gRNAs into cells. Most CRISPR pooled libraries have been created ...the chance of transducing a only a single gRNA per cell. The viral DNA containing the gRNA then integrates...next-generation sequencing of the genomic DNA. However, some cell types are poorly transduced by lentivirus, and thus...CRISPR libraries was not possible. Primary murine T cells cannot be transduced by lentivirus and have been...CRISPR pooled library can be used for screening of cells that are refractory to lentiviral transduction, ...

... therapy.” Journal of cellular physiology.  https://doi.org/10.1002/jcp.30064 2. Barman et al. 2020. ...Cas9 in Intestinal Stem Cell Organoids of Cystic Fibrosis Patients." Cell Stem Cell. 13, 653-658 (5 December...CRISPR in adult stem cells has huge potential, because the genomes of adult stem cells in organoid cultures...Genetic Disease in Mouse Via Use of CRISPR/Cas9." Cell Stem Cell. 13, 659-662 (5 December 2013). 8. Gerald Schwank...homologous recombination in cultured intestinal stem cells of patients with cystic fibrosis (8).   The difference...applied CRISPR to disease correction in adult stem cells isolated from two patients with cystic fibrosis....is a big advantage over induced pluripotent stem cells, which need to go through a phase of crisis where...

...improve the brightness of previous Nano-lanterns by 2-4 fold and permit five-color fluorescent imaging! ...have become indispensable tools for molecular and cell biologists over the last two decades, but their ...light. Long-term light exposure can also lead to cellular phototoxicity, and experimental success can be...quantum yield, and when transiently expressed in cells, generates much less signal than comparable fluorescent...three luminescent proteins can be used together in cells. As Nano-lanterns are not subject to photobleaching...phototoxicity, they successfully imaged multiple subcellular compartments over several minutes using Nano-...concentrations of the compound can be added to the media. Cellular esterase then converts diacetyl coelenterazine-h...

...to visualize multiprotein complexes.  Fig. 2. Multiplex immunolabeling with subclass-switched recombinant...cryopreserved hybridomas, immortalized cells created by fusing an activated B cell that produces the antibody of...of interest with a myeloma cell. This RNA was then used to generate cDNA, which  was used as a template...of hybridoma generated mAbs is that if the frozen cell line becomes non-recoverable, the stock of the mAb...hybridoma stocks, without having to grow up the cells. This RNA could then be used to generate functional...immunofluorescence-immunocytochemistry (IF-ICC.) This method was chosen because cells transfected with a plasmid to express the target... could be screened in a high-throughput manner. Cells were labeled with both a hybridoma generated mAb...

...work with Grows extremely fast (doubling time of ~ 2 hours) Amenable to genetic manipulation The first...path.   Yeast as a model organism Yeast are single cell, eukaryotic organisms formally classified as fungi...and S. cerevisiae (budding). Yeast make for an excellent model organism for a few reasons: Affordable...similarity to the ancient yeast strains and metazoan cells.   Applications for K. phaffii There’s a number ...protein bang for your media buck - it grows at higher cell densities than most of its counterparts, yielding...oxidative reactions. They are found in all eukaryotic cells and peroxisomes are where methanol metabolism occurs...in methylotrophic organisms. K. phaffii is an excellent model for peroxisome studies since their peroxisomes...

...labeling of different cell types within a sample to expected labeling (Figure 2). The panel of antibodies...the antibody in the same tube.     Figure 2: Schematic showing the use of an orthogonal approach...levels in your cell lines, you can consider a cell treatment approach. If there is a cell treatment (e....select a candidate cell line (e.g. DepMap) – you’ll need to ensure that the parental cell lines of your chosen...the parental cell line, but not in the iso-genic knockout control. This can involve cell surface labeling...selectivity for cell surface labeling may become less selective if used in intracellular labeling because...because the intracellular compartment may contain cross-reacting antigens not present on the cell surface....

...retransduce a model organism such as mice, e.g. first at 2 months, then at 4 months? Or do antibodies become ...co-delivering different AAV particles into the same cells in vivo? A: This will be highly dependent on vector...particularly one that can target the epithelial cells in the blood-brain barrier?   A: For liver, we recommend...worth investigating for both Q6 & Q7.For epithelial cells of the blood brain barrier we would currently recommend...and to all our participants for their time and excellent questions.    Additional Resources on the Addgene...

...axon terminals to the soma (retrograde tracer) (Fig. 2). Viruses as neuronal scalpels Viruses can be injected...they either trace downstream from the soma (neuron cell body) toward the axon (anterograde tracer) or upstream...particles require receptor-mediated entry into the cell. This means that not all neurons and pathways will...chemogenetic vector directly into the region where the cell bodies of the projection neurons reside.   Impact...

...containing complementary polynucleotide chains. J Virol 9(2): 394-396. Lecomte E, Tournaire B, Cogné B, Dupont... small amount of spurious DNA from the packaging cell line, helper and packaging plasmids. We decided ...

...extraction protocol for more details.   Figure 2: An uncut plasmid is expected to form 3 bands: nicked...efficient genome editing in Escherichia coli. Microb Cell Fact 19. https://doi.org/10.1186/s12934-020-01321...

...delivering an AAV construct expressing channelrhodopsin 2 (ChR2), a blue light sensitive cation channel, fused...and chemically excited a class of enteroendocrine cells within the intestines known as neuropods. They observed...

...PubMed PMID: 8491198. PubMed Central PMCID: PMC413431. 2. Bukrinsky MI, et al. “Active nuclear import of human...Non-Dividing Cells Transient Gene Expression Low Tropism for Mouse Cells and Hematopoietic Cells Low Packaging...fuses with the target cell’s membrane, allowing the viral particle access into the cell. The viral envelope... of cell the virus will target and fuse with. In nature, this determines which organisms and cells they...viruses can be engineered to be cell type specific. Once inside the host cell, the virus unleashes its cargo...wide range of cell types that are typically ‘difficult to transfect’, such as primary cells. They can also... them to easily deliver their “cargo” to target cells and organisms, and when that cargo is designed to...

... would release them into the cytosol. Fig. 2: Endogenous sources of duplexed RNA DNA:RNA hybrids...mammalian cells. Here, we will cover how these structures are generated, why it’s important for cells to sense...., Hur, S. Cellular origins of dsRNA, their recognition and consequences. Nat Rev Mol Cell Biol, 23: 286...performs almost all of its biological functions in our cells in the single strand form, but double stranded RNA...with bidirectional transcription. In an uninfected cell, dsRNA rarely circulates, but upon viral infection... Fig. 1: Exogenous sources of dsRNA Cellular sources of dsRNA Transposable elements such as...While these molecules are clearly associated with cellular damage and dysfunction, it is unclear what the...