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...crisprkit.org to request complete kits or find protocols and other resources. Find CRISPRkit plasmids here! Collins...through our Hot Plasmids articles. Here's what you'll find in this post: Cell-surface protein labeling tools...cell mitochondrial transfer tracker Red calcium indicators PinkyCaMP and FRCaMPi Micropeptide killswitch... Mike Lacy Cell-cell interactions underlie many kinds of tissue function, but these connections are exquisitely...in other brain regions, cell types, and tissues. Find cell-surface HRP plasmids here! Wu, L., et al. ...many different systems, both in vitro and in vivo. Find MitoTRACER plasmids here! Borcherding, N., & Brestoff...doi.org/10.1073/pnas.0510511103      Red calcium indicators PinkyCaMP and FRCaMPi By Mike Lacy Many popular...

...antibody binds a target protein in your sample, then a fluorescently labeled secondary antibody binds that...like. Plus, indirect IF amplifies the signal since multiple secondary antibodies will bind to each primary...Figure 1A), you’ll block, add primary antibody to bind the target, wash, add dye-conjugated secondary antibody...there are a few specific considerations to keep in mind. Most importantly, make sure you are using primary...However, the primary-secondary workflow (a.k.a. indirect IF) is more flexible and efficient, since you ...antibodies that have been validated in IF applications (find IHC validated or ICC validated antibodies from Addgene...and validate the antibody yourself. If you can’t find a suitable antibody against your target protein,...

...in Nature Biotechnology Find the base editors   Single base editor that induces C-to-T and A-to-G mutations...sgRNA scaffold with a com aptamer which binds an aptamer binding protein for packaging into a lentivirus-like...Addgene.org Read our CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids ... but we hope that this blog series will help you find more new CRISPR tools for your research! This time...Expression of this system is tunable via a rhamnose-inducible promoter. While this system was optimized for ...used in. Read the paper in ACS Synthetic Biology Find the CRISPRi toolkit SECURE adenine base editor...editors into one protein. They fused an activation-induced cytidine deaminase (AID) and an engineered tRNA...

...our Hot Plasmids articles.  Here's what you'll find in this post: Multiplexed perturbation and decoding... detection efficiency over the original CROPseq. Find CROPseq-multi plasmids here Walton, R.T., Qin, ... editing and found the protein La (a small RNA-binding exonuclease protection factor) promotes editing...improved efficiency is at least in part due to La binding and stabilizing the 3’ end of the pegRNA, which...additional potential improvements to the editor. Find PE7 plasmids here!     Figure 2: PE7 improves...Improving prime editing with an endogenous small RNA-binding protein. Nature. 2024 Apr 3. doi: https://doi.org...their paper for details on the original antibodies. Find Anti-SARS-CoV-2 Antibodies here! Terry, J.S., et...

...(PAM) on the opposite strand. Once it finds a PAM, Cas9 unwinds the adjacent DNA to create a region of... have an activity window restricted to the stretch of ssDNA created by Cas9 binding. Pro tip! In CRISPR...Red arrows indicate a conversion directly catalyzed by the base editor. Black arrows indicate natural cellular...strand of DNA for Cas9 to bind.   R-loop The structure formed by Cas9 binding to DNA and separating the...specificity and the R-loop structure. In order to bind DNA, Cas9 requires (1) a guide RNA, (2) a complementary...at certain positions within the editing activity window (Kurt et al., 2021). They hypothesized that the...components: the DNA repair protein rXRCC1, or the DNA binding and lyase domain of DNA polymerase β (PB) (Chen...

...voltage indicator Article contributed by Shreya Vedantam Genetically encoded voltage indicators (GEVIs)...blue-light-sensitive channelrhodopsins. Find the Ace-mScarlet voltage indicator plasmids at Addgene! Beck et al...functional. Exposure to red light induces PhyBΔ and PIF6APB binding, bringing the two halves of Cre together...deposits and we hope they'll make it easier for you to find and use the plasmids you need. If you'd ever like...therapeutic potential for the split base editors. Find the split base editors at Addgene. Levy et al., ...fluorescent optics. Existing red fluorescent voltage indicators, however, fall short compared to GFP-based sensors...linker between them. The Ace-mScarlet voltage indicator works like many FRET-opsin GEVIs. With an increase...

...on Asddgene.org Find Fluorescent Protein Plasmids Find Fluorescent Protein Kits Find Empty Backbones ...hairpin binding domains produce blue, green, or red fluorescence, depending on the hairpin binding domain...researchers have used fluorescently tagged DNA-binding proteins to label certain loci, but this approach...in vivo. Catalytically dead Cas9 (dCas9) cannot induce gene editing, but it retains its gRNA-directed ... when a. no gRNA was present or b. when a gRNA binding a non-mammalian sequence (GAL4) was supplied. ..., GFP, and RFP fused to the respective hairpin binding domain. Pairs of identical hairpin sequences specify...hairpin combination bringing the total number of individual colors to 6. A gRNA with all three hairpins generates...

...Addgene.org Read our CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids ... but we hope that this blog series will help you find more new CRISPR tools for your research! This time...the paper in Cellular and Molecular Bioengineering Find the optogenetic repressor plasmids Cytosine base...editing The original cytosine base editor, BE3, induces a low frequency of genome-wide off-target DNA editing...identified and validated CBEs with reduced Cas9-independent deamination. They generated these editors using...this study have ~10-100-fold lower average Cas9-independent off-target DNA editing, ~5–50-fold lower levels...BE4max.  Read the paper in Nature Biotechnology Find the base editor plasmids CRISPRi in Caulobacter...

...to be validated for high on-target binding and low off-target binding. It’s also possible that HIV-1 may...immunodeficiency syndrome (AIDS) in untreated individuals. Symptoms of AIDS include rapid weight loss and...opportunistic infections not usually seen in healthy individuals. Antiretroviral therapy (ART) can virtually eliminate...targeting of the enhancer region near the NF-KB binding sites increased activation of HIV promoter-luciferase...toxic proteins, CRISPR/Cas9 SAM caused apoptosis, indicating a true “shock and kill” response. Cutting HIV...CRISPR. CD4+ T-cells were isolated from healthy individuals, expanded, and infected with HIV-1. For two HIV...infected patients. Although this is an exciting finding, it’s important to note that these HIV-1 patients...

...protein, the antibody can't bind to it. As proteins change configurations or binding partners, the epitopes...instance, if you cannot find an antibody validated for Western blots, but find one validated for ELISAs...antibodies are well-organized, documented, and easy to find (though we might need to see it to believe it.) ...) As you browse the collection, you'll likely find some proteins of interest for which you have several...simple: epitope availability. An antibody can only bind to a target, or epitope, that it can access. If ...epitopes available for binding change as well. If this change hides the epitope that the antibodies used to ...antibodies, so it's good to keep epitope availability in mind whenever you're working with antibodies.) Conformation...

...intracellular staining where binding of large immune complexes may be hindered. Indirect staining can be beneficial...conjugated to a fluorochrome. In indirect staining a primary antibody binds to a target and a fluorochrome-conjugated...secondary antibody binds to the primary antibody. Direct staining is quicker than indirect staining and eliminates...viability controls such as DNA binding dyes and amine reactive dyes. DNA binding dyes, such as propidium iodide...the challenges of fluorescent protein fusions by binding to the protein in its native state.  Antibodies-based...Antibodies-based flow cytometry can use both direct and indirect staining methods. In direct staining, the primary...levels are low as multiple secondary antibodies can bind to a primary antibody thus amplifying the signal...

...fused to an RNA binding motif, and a RNA-binding protein-bEFP fusion. Thus, the bEFPs bind the UAS via the...Transcription from σ54 promoters requires binding of bacterial enhancer binding proteins (bEBPs) at a sequence upstream...deposits and we hope they'll make it easier for you to find and use the plasmids you need. If you'd ever like...genetic screens in cells with few genetic tools. Find the mouse CRISPR knockout library at Addgene. Henriksson...plaques. ApoB bound lipoproteins (ApoB-LPs) are indirectly measured through their triglyceride or cholesterol...strong correlation with cardiovascular disease and indirect measurement of ApoB-LPs through triglyceride/cholesterol...understanding and treatment of cardiovascular disease. Find the LipoGlo plasmids at Addgene! Lawler et al, QJM...

...chance of generating indels with base editors, keep in mind that the generation of indel sometimes may also...Addgene.org Find all CRISPR plasmids and resources at Addgene Find CRISPR base editors Find CRISPR plasmids...reducing the likelihood of detrimental indel formation. After binding with DNA, the CBE deaminates a target...heard about CRISPR, one question probably comes to mind: can CRISPR be applied to fix the defective base...the genome became achievable in 2016 when two independent groups (Komor et al., 2016 and Nishida et al....base editor would restore antibiotic resistance. To find such a protein, they created a mutant library of...can edit target 'A' if it lies in a small genomic window: at protospacer position 4-8 counting the ‘NGG’...

... for the 2019 All-India iGEM Meet-up, which served as a platform for all the Indian iGEM teams to interact...the Addgene blog Find our synthetic biology blog posts Resources on Addgene.org Find plasmids for your... the bitter cold.  Since our objective is to induce tolerance towards cold, we decided to focus on ...The importance of psychrophilic enzymes From an industrial perspective, the enzymes obtained from psychrophiles...diverse array of processes. The food processing industry, for instance, employs psychrophilic enzymes for...extremely useful benefits for any food processing industry as it can potentially help minimize the incidental...spoilage and improve the productive efficiency.  Finding recombinant psychrophilic enzymes for the host ...

...transfer vector with an inducible promoter (see below) should be used. Inducible lentiviral transfer vectors...containing both your transgene and tTA/rtTA (pINDUCER20, pINDUCER21) have been developed, but these vectors...Nature found a way to re-create a functional virus. Indeed, by testing several vectors and packaging cell ...your gene of interest either constitutively or inducibly. If your gene of interest is toxic or needs to...vectors The most widely used inducible lentiviral vector system is the tetracycline (Tet)-regulated system...transactivator (tTA, also expressed by your transfer vector) binds to the TRE and activates the expression of your ...system, tTA has been modified (and renamed rtTA) to bind TRE only in presence of Dox. In this case, your ...

...Tang et al. tested pairs of their GFP-binding proteins (GBPs) to find those that could co-occupy GFP. Once...love GFP, and we’re always excited when depositors find new ways to make this workhorse protein even more...Once Tang and Cepko found a description of GFP-binding nanobodies, the project really took off. Unlike... are small and stable inside cells. Nanobodies binding GFP were designed in 2009. Subsequent work showed...proteins, and these fusions retained the ability to bind GFP. The idea of using GFP as a scaffold suddenly... GBPa-VP16 (activation domain); GBPb-GAL4 (DNA-binding domain); and a UAS-driven luciferase reporter construct...fluorescent proteins dsRed, mCherry, and TdTomato do not induce transcription. Thus, T-DDOGs can be used in combination...

... a GCN4 binding scFv that’s fused to GFP. When the multiple copies of the scFv-GFP fusion bind the SunTag...cell. When a CAR has an scFv that binds cancer-related antigens, binding of the scFv part of the receptor...the smallest unit of an antibody molecule that can bind antigen. While they may seem unfamiliar, scFvs are...favors proper folding and formation of the antigen-binding site while also minimizing oligomerization of the... can generate functional scFvs; however, some individual scFvs performing better in one configuration ...antigen to select for scFvs with high affinity binding. Bound phage are then proliferated by infecting...screened with in vitro assays to select for strong binders. Then the sequences for the variable domains of...

...from Boguszewska et al., 2019.   Indirect ELISA The indirect ELISA is very similar to a direct ELISA...sample adheres to the well (either directly or by binding to an antibody that is coating the bottom of the.... These are sandwich, competitive, direct, and indirect. Sandwich and competitive ELISA use antibodies...is bound directly to the wells in a direct and indirect ELISA.   Sandwich ELISA Most commercially available...add your sample to the wells, and the antibodies bind to your protein of interest.  The next step is to...biotin-conjugated, streptavidin (which has a high affinity for binding biotin), is conjugated to the enzyme horseradish...protein — known as a reference antigen — that can also bind to that antibody. Then, the protein-antigen mixture...

...The field of induced pluripotent stem cells (iPSCs) has been around for 10 years. In that time, scientists...readers choose a strategy suited to their research. Find Plasmids for Stem Cell Research Delivery Method... iPSC-transplanted mice. Cre-deletable or Tet-inducible lentiviruses address some of these concerns, but...reprogramming. This can be overcome by using a Tet-inducible virus to allow for controlled expression of reprogramming...links at the end of the post for a list of Tet-inducible reprogramming vectors available from Addgene. ...loxP sites. While there is only a small loxP scar behind at the site of excision, this approach is still...of cell types and replicates in the cytoplasm independent of the cell cycle. A challenge of using Sendai...

...requires indirect staining of both targets in your specimen. You scour the literature and find an ideal...using the indirect method since a secondary antibody reactive to a certain isotype will bind to all members...antibody to bind to the anti-Protein A antibody and an anti-mouse IgG2a secondary antibody to bind to the ... are the same isotype and therefore cannot be indirectly probed simultaneously on the sample. What to ...the same isotype then the secondary antibody will bind to both and you will not be able to distinguish ...the same isotype can not be used for multiplexed indirect staining methods since the secondary antibody ...primary antibodies and the targets will be indistinguishable (top panel). If one of the antibodies is converted...