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...will cover: Miniature CRISPR-Cas systems SEND plasmids Prime editing improvements Miniature CRISPR-Cas...problem. A miniature CRISPR-Cas system for mammalian use Stanley Qi’s lab has developed a miniature Cas system...paper in Nature Biotechnology Find the Cas12f-GE plasmids Programmed genome editing by a miniature CRISPR-Cas12f... guide RNAs Yong-Sam Kim’s lab also created a miniature yet active Cas system starting with the same Un1Cas12f1...nuclease Quanjiang Ji’s lab describes an effective miniature Cas system that utilizes a Cas12f from a different...ribonucleoprotein, and AAV.  Read the paper in Nature Chemical Biology Find the AsCas12f1 plasmids   ...paper in Science Find the SEND plasmids    Figure 1: SEND combines an endogenous Gag homolog, cargo...

...and, when they mature, fluoresce red. The ratio of the mature color (red) to the immature color (green ...determination of expression time The ratio of mature to immature fluorescence from the FP timer is dependent...their knowledge of protein structure and saturation mutagenesis. mK-GO matures from green to red, and the...they predominantly fluoresce one color but slowly mature until they predominantly fluoresce a second color...580 nm) over the course of 18 hours in vitro (see figure 1B in Terskikh et al.) and even displays predictable...linear window for the theoretical timer shown in Figure 1B, you can use the equation fit to this linear... system composed of two separate FPs (one that matures quickly and the other slowly, see Verkhusha et ...

... from a heterogeneous mixture - for example, cell lysate or media from cultured cells. ELISA can be used...cell subsets of interest from among the mixture and to measure the relative amount of your protein of ...antigen the antibody recognizes and binds to.   Figure 1: Labeled diagram of an antibody including Fc,...). Single-chain variable fragment (ScFv) Figure 2: Comparison between the IgG antibody and scFv...Chain Fragment Variables (scFvs). Nanobodies Figure 3: Comparison of the Hcab and nanobody. Nanobodies...can be used for qualitative and quantitative measurement of protein expression in cell lysates, whole ...presence of proteins from samples containing a mixture of proteins. The proteins are separated based on...

... IF instead (Figure 1B). To label all your targets in one step, you simply use a mixture of primary antibodies...puncta in each cell. When making figures for a paper or presentation, make sure the images are accessible to...as immunocytochemistry (ICC) when the sample is cultured cells or immunohistochemistry (IHC) with tissues... you can perform simultaneous detection with a mixture of primary antibodies and appropriate secondary...(Im et al., 2019; McLaughlin, 2019).    Figure 1: Schematic of multiplex immunofluorescence approaches.... Sequential IF For a sequential IF experiment (Figure 1A), you’ll block, add primary antibody to bind...antibodies, wash, add a mixture of secondary antibodies, and image all the different colors in one session...

...is consistent with the result in Figure 1 could look like this: Figure 2: Expression of Plasmid B (as internal...effect, which is green fluorescent cells (Figure 3).   Figure 3: Expression of Plasmid B (as positive control...control plasmids? Generally, control plasmids help to ensure that the observed phenomenon in your experiment...of Gene X using shRNA expressed from a plasmid   Figure 1: Expression Level of Gene X The results shown...vector and internal control A transfection control measures transfection efficiency and enables observation...Referring back to the experiment associated with Figure 1, the independent variable is the shRNA. Therefore...transfection control is an internal control vector, which measures transfection efficiency. An internal control may...

...the full plasmid and confirm features you annotate on this page. Figure 7: Enter information about the... (for emailed submission) in the Deposit menu: Figure 1: Begin the deposit process by clicking "Submit...are two options to begin your plasmid deposit. Figure 2: Choose to submit plasmid(s) online or by using...deposits of 10 or more plasmids.     Figure 3: If submitting plasmid(s) online (left), choose...will become your article title.       Figure 4: Add plasmids to the article by clicking “Add...begin entering the specifics of your plasmids. Figure 5: Click the "Enter Data" button to add your plasmid...Continue to Next Step" (blue button at the bottom of Figure 6) or you can click the "Save" button and jump ...

... contain similar features and it allows you to more quickly identify the same feature in other plasmids...our new Snapgene generated maps provide improved feature detection with an easy to use interface. We regularly...quality control process because of its expansive feature library and useful tools. In this blog, we’ll walk... a plasmid and we’ll highlight some of the new features available on our website through our Snapgene ...quality control are: To identify important plasmid features To align NGS sequencing results with reference...further plasmid verification Identifying plasmid features While our quality control process for incoming...Snapgene to visualize the sequence and look for features. The first thing that the Snapgene software will...

...nanometers of each other, or measure the tension in the helical structure of spider silk, or the activity...that you want to measure (overexpressing a gene or protein after transfection). Future of FRET The first...in a synapse. What kinds of tools enable us to measure these properties, and what fascinating experiments...dipole-dipole interaction. The efficiency of FRET can be measured for a given donor-acceptor pair and a change in...fluorophores and serves as a small-scale ruler to measure distances that are too miniscule for conventional...improved dynamic range for fluorescence lifetime measurements." PloS one 10.8 (2015): e0134436. PubMed PMID...proteins can contribute additional noise to the measurement. If the distance or orientation of the donor ...

...processing (Figure 1). The shRNA sequence is transcribed to produce hairpin shRNA structures that are processed...Dicer chops off the loop of hairpin structures to create a mature siRNA duplex. Fun fact! Endogenous miRNA...upstream and downstream genomic sequences (Figure 2B).   Figure 2: A comparison of an shRNA plasmid sequence...mRNA or recruits other silencing proteins. Figure 1: Comparison of shRNA and miRNA processing and...Choosing the plasmid backbone Choosing the promoter Mature siRNAs typically range from 19–22 nucleotides and...target sequence. However, you can’t just use the mature sequence in a plasmid and call it a day. You need...complementary RNA duplex and the hairpin loop sequence (Figure 2A). Since you don’t need additional flanking sequences...

... In Figure 1, you can see cumulative numbers of CRISPR plasmid distribution and deposits (Figures 1A and...although we used different categories (Figure 2C). Note that in Figure 2, the numbers on the X axis refer ...new tools, illustrated in Figure 2, and the longevity of tools seen in Figure 3, indicates that the usefulness...the top ten countries for each group (Figure 4).    Figure 4: Addgene deposits and distribution ...number of labs who have deposited CRISPR plasmids (Figure 1C), and the cumulative number of CRISPR libraries... 100 new CRISPR depositors each year.    Figure 1: Addgene CRISPR distribution and deposits. (A...300,000 CRISPR plasmids and 12,000 CRISPR libraries (Figure 1D). That’s a lot of editing!  CRISPR functions...

...autofluorescence extraction feature. Although autofluorescence extraction is an optional feature of spectral flow...that have distinct spectral signatures and a low similarity index. In figure 3, we can see that PerCP and... detector for that fluorophore. For example, in figure 1, the FITC signal is spilling over into the primary...that spectra to use for compensation.     Figure 1: The emission spectra and filters for FITC and...flow since the machine uses the full spectral signature, not just a narrow band, to discern one marker...fluorophore from another within a fully stained sample. Figure 2 is an example of the emission spectra for two...another during spectral unmixing.     Figure 2: The full emission spectra for BV421 and BV711...

... and how will you ensure this?). You should also consider if there are any features of the library backbone... estimate transformation efficiency (Figure 2).    Figure 2: Example of a serial dilution to estimate...might be more difficult to transform.    Figure 1: Factors to consider when creating a pooled library...estimate transformation efficiency. Figure used with permission from the Mark Dawson lab Re-transformation...generally electroporated into electrocompetent cells to ensure the highest possible transformation efficiency....Using Stbl4 or other ultra-high efficiency cells ensures that plasmid diversity in the library is maintained.... The specifics of this can be based on the manufacturer’s protocol for transformation and expected transformation...

... through a structured material over a long distance? And can we understand such a structure well enough...that contain an R body-like structure. As the bacteria develop, the structure extends to rip the bacteria...’t be overstated, we can also learn a lot from Nature’s simpler solutions to transmitting forces over ...contract in response to changing pH, and they can rupture E. coli spheroplasts to release encapsulated proteins...inside cells, and these constructs may be useful to future scientists who would like to further study R body...

...undue pressure, impossible deadlines, unnecessary disruptions Destabilization – including failure to acknowledge...choose and it will make a huge difference for your future career and life. You might see a lab head as choosing...can give open, revealing information about the culture and lab head. While it’s good to talk to new lab...head. Former lab members can give you a fuller picture. Consider talking to people in the lab across the...frequently cancelled? Choosing a role model Make sure the mentors you choose are teaching the stuff you...stay around? Is it too long or do they leave prematurely? Do lab alumni stay in the same field taking...bullying. Even with the rise of movements such as the Future of Research Symposium and #MeTooSTEM, academic ...

... users coat a multiwell plate with a capture reagent. The capture reagent may be an antigen or an antibody...et al. originally developed the ELISA assay to measure antibody levels, scientists have since adapted ...on how the assay is set up. Then they block the capture reagent to prevent non-specific interactions. Next...consider alternative detection methods.      Figure 1: The four types of ELISA are direct, indirect...ELISA the multiwell plate is first coated with a capture antibody that binds to the antigen in a sample ...proportional to the level of antigen in the sample. This figure was created with BioRender.com  Direct ELISAs...cross-react with samples, eliminating them from the procedure removes one potential source of cross-reactivity...

...give a quick overview of each CasPEDIA feature. Activity features: CasID CasPEDIA will display both the...mixed). This information represents the ‘big picture’ features of the enzymes documented that should narrow...design, etc.). With this feature, you can compare different Cas enzymes to make sure you are getting the desired...resource for the scientific community. What are the features? CasPEDIA has collected relevant information on...Experimental guidelines and applications Protein structure and properties Links to relevant resources The...designed, if that’s your end goal. CasPEDIA also features useful links to Addgene resources throughout the...packaging limitations. Maybe you want to read literature on the less common applications of an enzyme ...

...without DNA cleavage. Nature, 551(7681), 464–471. https://doi.org/10.1038/nature24644 Gaudelli, N. M., Lam...double-stranded DNA cleavage. Nature, 533(7603), 420–424. https://doi.org/10.1038/nature17946 Komor, A. C., Zhao,...other or one pyrimidine base to the other. Figure 1: Base transition editors catalyze purine-to-purine...strand as a template, copying the base edit. Figure 2: Cytidine deamination takes place on the free...base editing efficiency for mammalian edits is to ensure the editors make it into the nucleus and that they...and specific CRISPR-based cytosine base editing. Nature Biotechnology, 41(5), 663–672. https://doi.org/...increased activity and therapeutic application. Nature Biotechnology, 38(7), 892–900. https://doi.org/...

... photostability measurement of various cyan fluorescent proteins is depicted in figure 1. Of note, the... noted that the photostability measurements reported in the literature are performed in different ways...photostability, an experiment is performed that measures fluorescence intensity over time. In order to ...with low excitation power. By repeating these measurements for different fluorescent proteins and by comparing...protein distribution. Therefore, photostability measurements can be performed with soluble fluorescent proteins... the experimental designs used to make these measurements and hope this information can help guide your... The second issue is that, in experiments that measure photostability, high excitation powers are often...

...et al., Nature Chemical Biology additionally provides detailed information on cloning procedures used to...at doses as high as 20 µM (see Figures 3 and 5 in Nabet et al., Nature Chemical Biology for examples).... cereblon, leading to rapid target degradation (Figure 1). Plasmids: We generated a series of plasmids...molecules will be commercially available in the near future, and we will provide an update with vendor and ...FKBP12F36V tag without disrupting protein function. A literature search can help determine which terminus is favorable...molecules in your biological assay of choice to ensure that there are no toxicities at the doses used ... roles in Multiple Myeloma), it is important to ensure lack of degradation in your context. Immunoblotting...

...candidate antibodies from the manufacturer and/or in the published literature. Note that the antibody being...candidate cell line (e.g. DepMap) – you’ll need to ensure that the parental cell lines of your chosen KO ...specific antibody:target combination of interest (Figure 1). It can therefore be helpful to try all three...looking to label an intracellular target.   Figure 1: HCT 116 WT and SYT1 KO cells were labelled with...monoclonal antibody, ** = recombinant antibody. Figure adapted from Biddle et al., 2024.   Once an...separation between the wild-type and the KO population (Figure 1), further optimization can be performed to both...it can be a real challenge to troubleshoot RNAi failures. Potential explanations for RNAi not reducing ...