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We narrowed to 809 results for: LAS

Showing: 181 - 200 of 809 results

  1. Delivery Methods for Generating iPSCs

    Type
    Blog Post
    Published
    April 17, 2018, 1:37 p.m.
    ...making induced pluripotent stem cells: reprogramming à la carte." Nature Reviews Genetics 12, no. 4 (2011):...into cells as a donor plasmid containing the transposon, along with a helper plasmid that expresses the ...reprogramming factors. Non-replicating Plasmids: Generating iPSCs with plasmid-based expression requires serial... generating iPSCs by plasmid transfection where 2 of 11 clones tested had plasmid integration. Another...the dose of plasmid the cells receive over the whole reprogramming period and the plasmid will get diluted...larger plasmids have lower rates of transfection. Minicircles: Minicircles are like mini-plasmids. They...reflection of the large size of the plasmid or silencing of the plasmid by DNA methylation. Another downside...

  2. A Look at Addgene's QC Process

    Type
    Blog Post
    Published
    May 6, 2025, 1:15 p.m.
    ...blog Addgene's Tips for Plasmid Quality Control Plasmids 101: In-house NGS Plasmid Quality Control Now at...sequencing all incoming plasmids. If you are interested in requesting one of these plasmids, you can request ...data for each of their plasmids, from descriptions of key components of the plasmids to partial, full, or...to ensure all plasmids pass our high-quality standards and contain the expected plasmid features.  ...Once Addgene receives deposited plasmids, they undergo complete plasmid sequencing using an in-house Illumina...will compare the NGS results to the plasmid information, other plasmids in the deposit, NCBI sequence and...results and deposited sequences and plasmid information.  For each plasmid deposited at Addgene, QC scientists...

  3. CRISPR 101: Multiplex Expression of gRNAs

    Type
    Blog Post
    Published
    Sept. 10, 2020, 11:45 a.m.
    ...multiple gRNAs on the same plasmid, you’ll make sure that each cell that gets the plasmid contains all of the...rectangles) are cloned into various plasmids using oligonucleotides. These plasmids contain Type IIS restriction...different purposes.   Gersbach Lab multiplexing plasmids: This plasmid set allows you to express 2-4 gRNAs, with...gRNAs into spectinomycin-resistant plasmids pX330S-2 to pX330S-(last gRNA number). The 5’ most gRNA is ...assembled to produce a plasmid encoding the gRNAs and Cas9. As with the Gersbach lab plasmids, multiple Cas9 ...Golden Gate/Gibson Assembly Multiplexing Plasmids: These plasmids allow you to assemble 2-4 gRNAs through...Golden Gate/Gibson Assembly Multiplexing Plasmids: These plasmids can be used to express up to 8 gRNAs after...

  4. Typing CRISPR Systems

    Type
    Blog Post
    Published
    March 18, 2025, 1:15 p.m.
    ...BioRender.com.   Class 1 versus class 2 There are two CRISPR classes: Class 1 and Class 2. Class 1 CRISPR systems...in archaea, though Class 1 remains largely underutilized compared to Class 2. Class 1 Despite their incredible...began building optimal plasmids to harness the power of Class 1 systems. Class 1 CRISPR systems can be...functions. Class 2 Class 2 CRISPR systems rely on a single protein Cas effector and are likely the class most... your own research! Classification Structure Principles of CRISPR classification While CRISPR systems... analysis, CRISPR classifications were placed into a fairly simple hierarchy: class to type to subtype...hierarchy, the main aspects of each class and type are easy to understand. Classes are based on the main Cas effector...

  5. Site Directed Mutagenesis by PCR

    Type
    Blog Post
    Published
    Aug. 2, 2016, 2:30 p.m.
    ...mutagenesis of Plasmids. A) Generation of mutagenized plasmids. PCR primers (green) amplify the plasmid template...with the nuclease-resistant nicked plasmid (the PCR product). Plasmids are isolated from the resulting colonies...the final circular plasmid product pictured here. B) Screening of recovered plasmids for the mutation of...Smaller plasmids (~3 kb) are generally more efficiently amplified than larger constructs, but plasmids as ...DpnI) to eliminate the parent plasmid from the PCR products, the plasmid template should be isolated from...have taken up the mutagenized plasmid. Note that any residual parental plasmid (usually from incomplete DpnI...additional restriction site into your plasmid, then, when the plasmid is digested with the appropriate restriction...

  6. Bacterial Toxin-antitoxin Systems as Molecular Biology Tools

    Type
    Blog Post
    Published
    Nov. 1, 2018, 12:35 p.m.
    ...cells to retain plasmids - if a cell does not inherit plasmid due to improper plasmid partitioning, it...unstabilized plasmids were retained in less than 10% of cells while plasmids containing the plasmid addiction...ensure that plasmids are passed down through generations (Figure 1). These so called “plasmid addiction ...only survive if they retain the plasmid. Since their discovery, plasmid addiction systems have been used...found that if a mini-F plasmid carried a specific 700 bp segment of DNA, the plasmid was propagated better...selection in one plasmid, they were able to create an efficient cloning tool. The plasmid pKSCTMF contains...restriction-modification systems onto plasmids allowed cell populations to retain more of these plasmids as compared to those...

  7. Twenty Years of Addgene Sharing: CRISPR

    Type
    Blog Post
    Published
    April 18, 2024, 1:15 p.m.
    ...these CRISPR plasmids (and libraries)? We wanted to know, so we classified CRISPR plasmids containing a... (A) Cumulative CRISPR plasmids shipped by year. (B) Cumulative CRISPR plasmids deposited with Addgene...,000 CRISPR plasmids in our repository, and we have shared almost 300,000 CRISPR plasmids and 12,000 CRISPR...CRISPR plasmids requested each year by year of deposit (Figure 3), we saw that once CRISPR plasmids become... CRISPR plasmids seem to never truly go out of style. Instead, an almost even mix of plasmids (by age)...Total CRISPR plasmids deposited by country; square size is proportional to number of plasmids deposited ...Total CRISPR plasmids requested by country; square size is proportional to the number of plasmids requested...

  8. DNA Purification Without a Kit

    Type
    Blog Post
    Published
    Feb. 11, 2020, 2:15 p.m.
    ... Read our Plasmids 101 blog series Find other plasmid protocols and tips Browse our plasmid cloning blog...alkaline lysis plasmid miniprep Starting material: 2 mL bacterial culture Product: plasmid DNA This kit-...kit-free plasmid miniprep protocol from Addgene follows a similar workflow as a column-based plasmid extraction...the DNA is ready for use! Plasmid purification and DNA gel extraction with glass syringe filters Starting... or agarose gel slices Product: plasmids or DNA fragments The plasmid purification and DNA gel extraction...columns, it’s bound to glass syringe filters. Normally DNA does not bind silica or glass, but the addition ...coaxes it into sticking to the hydrophobic glass filter. Each glass filter can capture up to 150 ug of DNA...

  9. Increasing Your Work's Visibility with Addgene: Citation, Search, and Collections

    Type
    Blog Post
    Published
    March 10, 2016, 3:30 p.m.
    ...curating plasmid collections. Addgene's "How to cite this plasmid" section Anytime you use a plasmid from ...variety of plasmids in the repository. And last, but certainly not least, we often feature new plasmid technologies...process, we explain how to cite plasmids from Addgene right on our plasmid pages and provide a citation ...comparing two plasmids, we recommend reviewing the cited papers to determine whether the plasmid has been ...collection or if you think a particular plasmid or type of plasmid is missing from our collections pages...spotlight some of the plasmids that have come through our doors in our “Hot Plasmids” section. We’ve also... added the Plasmid of the Day feature to our home page - each day we showcase a new plasmid that you might...

  10. Building and Validating Recombinant Antibodies: A Case Study

    Type
    Blog Post
    Published
    April 5, 2022, 1:20 p.m.
    ...within the plasmid backbone to generate R-mAbs of different subclasses, including subclasses that were ...important collection.  Creating the Plasmids To begin constructing the plasmids for expression of mAbs, the Trimmer...expression plasmids were DNA sequenced to determine the VH and VL sequence. These plasmids have been deposited...scientific community with the plasmid sequences available from each plasmid webpage. Importantly, the methods...different subclasses, but there are also secondary antibodies that are specific to each subclass. Approximately...mouse mAbs are IgG1 subclass (Manning et al. 2012), which limits the use of subclass specific secondary...original hybridoma. By using subclass specific secondary antibodies and subclassed switched R-mAbs, multiple...

  11. Addgene Depositors Get More Citations

    Type
    Blog Post
    Published
    April 20, 2017, 2:30 p.m.
    ...associated plasmids with Addgene. Since then, Addgene has filled over 6,500 requests for these plasmids. While...without plasmids at Addgene To find out whether scientific articles associated with Addgene plasmid deposits...those containing plasmids that the authors deposited with Addgene and those without plasmids deposited with...2,596 of which had plasmids deposited with Addgene. Articles with Addgene plasmids get more citations ...with plasmids deposited at Addgene – typically about four times as many as papers without plasmids deposited...Papers without Addgene Plasmids in Journal (E) Percent of Papers with Addgene Plasmids in Journal (F) Weight...more interestingly, could we tell if depositing a plasmid with Addgene causes a paper to get cited more? ...

  12. The Blue Flame Award: Celebrating Addgene's Most Requested Depositors

    Type
    Blog Post
    Published
    Nov. 14, 2016, 3:30 p.m.
    ... Requested Plasmid in 2015 Find Hot Plasmid Technologies Write about Your Favorite Plasmid Technology ... indicates that a plasmid has been requested 20+ times   A red flame means a plasmid has been requested...answering plasmid requests can be a time-consuming chore for labs that have popular plasmids but lack ...All plasmids deposited at Addgene enhance scientific sharing worldwide but a select few are particularly...particularly special. Over 1000 of our 60,000+ deposited plasmids have been requested more than 100 times each, ...to sharing epitomized by the creators of these plasmids with the first annual Blue Flame Awards. What'...scientists around the world choose to share their plasmids through our repository since we know biological...

  13. Stabilized Bacterial Promoters: Constant Gene Expression at any Copy Number

    Type
    Blog Post
    Published
    Sept. 4, 2018, 12:53 p.m.
    ...this case, plasmid copy number is the input and gene expression is the output. The input, plasmid copy number...to decouple gene expression and plasmid number. In a suite of plasmids modified from pSC101 with copy ...of all types of plasmids, the stabilized promoters were also tested in different plasmid backbones that...stationary phase, the number of plasmids per cell increases 4-5 fold (for pUC plasmids) or ~2 fold (for p15a, ...RepA is a plasmid replication initiator protein, they could alter copy number of the plasmid by altering...genome or a plasmid. Thus, a stabilized promoter can allow a system to be moved from a plasmid to the genome...special collections page Download the Plasmid 101 eBook See all plasmids deposited by the Voigt lab ...

  14. Educational Planarian Tools for Teaching Developmental Biology Techniques

    Type
    Blog Post
    Published
    May 24, 2018, 1:20 p.m.
    ... beginning. In most classrooms, the laboratory experience is focused on classical embryology techniques...experiments in planarians with their recent plasmid deposit. These plasmids enable two main types of experiments... cloned into plasmids to investigate for each of these planarian species. These plasmids all have a PR-T4...insert the cDNA into the desired plasmid backbone. The Sánchez lab plasmids allow students and new labs to...feedback etc. please write to cuttingclass@stowers.org and if you make new plasmids for investigating different...Resources at Addgene.org Find plasmids from the Sánchez lab Find plasmids for other developmental models...of specific gene expression. The 49 deposited plasmids enable students to study gene expression and functions...

  15. The Materials Science of Optogenetics Experiments

    Type
    Blog Post
    Published
    Sept. 17, 2015, 2:30 p.m.
    ...determine the ideal excitation). Lasers can be purchased through Laserglow, which caters to optogenetics ...users and adjusts the lasers appropriately (tuned for optogenetics). These lasers are relatively cheap ... run you about $2-3,000/laser. However, an important caveat is that one laser can stimulate only a single...apparatus and thus individual laser stimulation is essential. In terms of the laser stimulation itself, the ...control output of several lasers simultaneously, can be used to set the laser output without manual manipulation...patch cable to connect to the laser and rotate 360° without a loss of laser power. More recently, wirelessly-controlled...neuroscience validation experiments we discussed last week are only half of the battle when using optogentics...

  16. Deep Mutational Scanning with One Pot Saturation Mutagenesis

    Type
    Blog Post
    Published
    Feb. 22, 2017, 3:30 p.m.
    ... Can I use my favorite plasmid with this protocol? Maybe. Not all plasmids will work for the one-pot...strands of the plasmid will be nicked during the first BbvCI digest and the whole plasmid will be degraded...those in the plasmid. Again, if they are in the opposite direction, both strands of the plasmid will be nicked...map of your plasmid. If the sites are in opposite directions, you just need to use a plasmid with BbvCI...Mutagenesis to Mutate Your Plasmids Resources on Addgene.org Find Plasmids from the Whitehead Lab Use.... This technique relies on the generation of a plasmid library that expresses all desired variants of ... a selective pressure winnows the pool down to plasmids expressing variants with optimal function. High-throughput...

  17. Viral Vectors 101: Viral Vector Elements

    Type
    Blog Post
    Published
    July 25, 2023, 1 p.m.
    ...lentiviral plasmids Addgene's most popular retroviral plasmids Addgene's collection of AAV plasmids Addgene...split across several plasmids (often three), for safety purposes. The primary plasmid with the delivered...often a gene) is called the transfer plasmid while the other plasmids with packaging or replication components...of adenovirus plasmids Resources on the Addgene blog Parts of the AAV packaging plasmid Overview of Lentiviral...For safety and production reasons, multiple plasmids with many components are used to package lab grown...can be intimidating at first to look at so many plasmid maps and protocols! In reality, there are many ...components are called helper plasmids. Below, we’ll breakdown the vector components first by virus and then...

  18. CRISPR-based Genome Editing Systems For Editing in E. coli

    Type
    Blog Post
    Published
    April 13, 2021, 1:15 p.m.
    ...beneficial for plasmid clearance. It is more convenient to update the spacer(20nt) on pEcgRNA plasmid as only.... pCutamp cures the plasmids by targeting the ampR promoter in all three plasmids. pCutamp is then removed... 13 plasmids with 14 rounds of transformation in 30 days. Figure 2: (A) MUCICAT plasmids for ...Originally published Apr 13, 2021 and last updated Aug 12, 2021. This post was contributed by guest bloggers... original pCas/pTargetF system consists of one plasmid that expresses the S. pyogenes Cas9, a temperature-sensitive...the pTargetF construct and then introduce both plasmids into the cell. The edit in the chromosome can ...the pMB1 replicon, resulting in cutting of the plasmid. At this point, subsequent introductions of pTargetF...

  19. Tips for CRISPR Gene Editing in Mice

    Type
    Blog Post
    Published
    June 28, 2016, 10:59 a.m.
    ... target plasmid and pX330-sgRNA plasmid (Mashiko et al. 2013). The pCAG-EGxxFP target plasmid contains...pCAG-EGXXFP plasmid along with the individual gRNAs in their PX330 plasmids (or similar plasmids for gRNA... (c) The pCAG-EGxxFP target plasmid was co-transfected with pX330 plasmids containing sgRNA sequences ... system floating around, and many pre-designed plasmids containing these variants ready for purchase. ...multi-cloning site (MCS) between EGFP fragments. The pX330 plasmid contains humanized Cas9 expression cassette and...HEK293T cells. The fluorescence intensity was classified into four groups (4; brighter than control, 3... you can insert this region into a pCAG-EGXXFP plasmid using standard cloning techniques (The XX indicates...

  20. Overcoming the Challenges of Lentiviral Production

    Type
    Blog Post
    Published
    Aug. 7, 2018, 12:31 p.m.
    ... multiple plasmids. Second generation packaging systems use 3 plasmids; an envelope plasmid that usually...encodes VSV-G, a packaging plasmid containing structural genes and a transfer plasmid carrying the transfer...Rev gene from the packaging plasmid and incorporating it into a fourth plasmid. In addition, the promoter...and packaging plasmids in order to obtain the best titers. Requiring an additional plasmid for transfection... 5-layer flask will require some initial optimization; cell number, media volume, and plasmid concentrations...By dividing the viral elements across multiple plasmids, the risk of recombination and consequently, the...extra level of safety, they also require a fourth plasmid. The requirement for additional DNA can impact ...
Showing: 181 - 200 of 809 results