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  1. Tips for Using BLAST to Verify Plasmids

    Type
    Blog Post
    Published
    May 29, 2014, 1:29 p.m.
    ...compare a Sanger sequencing result to a single known reference sequence or to a BLAST sequence database. If...nucleotide sequence, check the “Align two or more sequences” checkbox and paste your reference sequence into...or more sequences" option and pasting your expected protein sequence into the Subject Sequence box. BLAST...compare the sequencing results of the plasmids in our repository with known reference sequences, such as ...blastp or blastx to compare our sequencing results to protein sequences to check open reading frames (ORFs...into the Subject Sequence box that appears. Aligning two nucleotide sequences is probably the fastest BLAST...know the exact reference sequence for your result, choose one of the BLAST sequence databases from the dropdown...
  2. Addgene's Tips for Plasmid Quality Control

    Type
    Blog Post
    Published
    Jan. 14, 2016, 3:30 p.m.
    ...sample handling, or sequence assembly steps. All of our incoming plasmids are sequenced at least twice, and...’t get reliable sequence data back for the first 50-100 base pairs of your sequencing read. You can expect... plasmid sequencing If you’re like us, you need a strategy for processing several sequencing reactions...opposed to purified DNA or colony sequencing. This means that we are sequencing from the exact same stock that...glycerol plate on dry ice to the sequencing provider. Each sequencing service will have different requirements... you to quickly BLAST your sequencing result against the expected sequence for quick verification, which...multiple sequences to visually check for homology and mismatches. Do you have your own best sequencing practices...
  3. Evolution of Lab Techniques

    Type
    Blog Post
    Published
    June 21, 2016, 2:30 p.m.
    ...selecting a smaller subset to sequence. Sequencing gels and next-generation sequencing techniques Introduced ... and Benjamin Chain. "The sequence of sequencers: The history of sequencing DNA." Genomics (2015). PubMed...Sanger sequencing but instead use methods like pyrosequencing that are parallelized to sequence thousands...Restriction mapping and modern sequencing Restriction mapping informs on DNA sequence through the use of restriction... you have a genome with unknown sequence. In the era before sequencing was commonplace, researchers used...approach to studying DNA sequences helped researchers at a time when sequencing was still in the early ...Introduced in 1977, Sanger sequencing, also known as chain-terminating or dideoxy sequencing, was a major breakthrough...
  4. A Look at Addgene's QC Process

    Type
    Blog Post
    Published
    May 6, 2025, 1:15 p.m.
    ... have a full sequence, as they were deposited before 2017 when Addgene started sequencing all incoming...to partial, full, or annotated plasmid sequences. These sequences can also be confirmed or theoretical....undergo complete plasmid sequencing using an in-house Illumina MiSeq. The raw sequencing reads are assembled... circularized plasmid sequence de novo (without the use of a reference sequence) using a bioinformatics...the deposit, NCBI sequence and protein data, as well as available backbone sequences. All of these resources...visualize and identify sequence differences between our NGS results and deposited sequences and plasmid information...elements that are difficult to sequence; approaches to confirm plasmid sequences without a reference; and identifying...
  5. Plasmids 101: Walkthrough of Addgene’s Snapgene-Powered Quality Control Process

    Type
    Blog Post
    Published
    Feb. 1, 2018, 3:07 p.m.
    ... new sequencing partner seqWell and going into detail about how we use next generation sequencing results...plasmid features To align NGS sequencing results with reference sequences To design experiments for further... plasmid, we next verify that our sequencing results match sequence information contributed by the depositor...depositor, published backbone sequences, and any known sequences for the insert. The Snapgene desktop software... any differences between our sequence results and the reference sequences. Using Snapgene for additional... might need to send it for Sanger sequencing to verify the sequence within that region. We have designed...scientist at Addgene uses Snapgene to confirm the sequence of a plasmid and we’ll highlight some of the new...
  6. Plasmids 101: In-house NGS Plasmid Quality Control Now at Addgene

    Type
    Blog Post
    Published
    April 6, 2021, 12:30 p.m.
    ...ownership of this process with in-house sequencing! In addition to sequencing plasmids, we have also started using...prepared for Illumina sequencing on our newly donated MiSeq.  For Complete Plasmid Sequencing we perform a 2x251... the NGS result to a reference sequence like a known backbone sequence. We’re not necessarily expecting...by direct alignment to an NCBI reference sequence or a sequence provided by the depositor. Depositing labs...splice acceptor, contains sequence that is over 80% GC. Some IRES sequences also contain regions that ...rich. Since NGS assembles a larger sequence from many smaller sequences, regions with repeats may not assemble...that we do not fully sequence all plasmids in the pool but instead selectively sequence the variable portion...
  7. Improved Plasmid Maps Powered by SnapGene

    Type
    Blog Post
    Published
    June 29, 2017, 1:06 p.m.
    ...SnapGene file for the sequences listed. You can then analyze the sequence in your sequence viewer of choice...SnapGene’s sequence viewer software and extensive feature library, our updated plasmid and sequence displays... our sequence analyzer will allow you to dive into the details. Click on the “View all sequences” button...find all available sequence information from Addgene depositors and our own sequencing results: On this ...paste functionality. Sequence Similar to the plasmid maps, the linear sequences hosted here are now ...two separate locations in the linear sequence selects the sequence between the two locations and sends ...detected in a given nucleotide sequence. The table includes primer names, sequences, binding site locations,...
  8. 6 Tips for Analyzing and Troubleshooting Sanger Sequencing Results

    Type
    Blog Post
    Published
    June 26, 2014, 2:23 p.m.
    ...chromatogram) of the sequencing results you get back from your favorite sequencing facility. When it comes...certain as the sequence may suggest. In fact this is so ambiguous that the DNA sequencing reaction should...purification of the samples you send for DNA sequencing If your sequencing facility requires you to perform your...edit the sequence.   I hope these tips will help you get the most out of your DNA sequencing results ... come up. Good luck analyzing your sequences! More DNA Sequencing Resources: Tips for Using BLAST to... plasmid quality at Addgene, I analyze 50-100 sequencing reactions a week. So I have developed some good...the most out of the data you get back from your sequencing runs.   When you run a restriction digest on ...
  9. Build Your CRISPR Vocabulary

    Type
    Blog Post
    Published
    July 2, 2024, 1:15 p.m.
    ...is composed of identical repeat sequences and variable spacer sequences. The array is transcribed and processed...shown here). The repeat sequence base pairs with the tracrRNA, and the spacer sequence is used to target complementary...complementary DNA sequences. In laboratory settings, an sgRNA includes the crRNA and tracrRNA sequences in a “single-guide...cut by Cas9, whose sequence is not checked. Assuming full complementarity, its sequence matches the guide...array and include a spacer and a repeat sequence. The spacer sequence is the RNA guide, like a wanted poster...to the programmable guide sequence as the spacer and the remaining sequence as the scaffold. gRNA: "Guide...encountered foreign nucleic acids. The unusual sequence of these arrays, with alternating spacers and ...
  10. Sequencing Options for CRISPR Genotyping

    Type
    Blog Post
    Published
    Oct. 4, 2016, 2:30 p.m.
    ...Amplicon Sequencing Provided 0.01% (variable) Sequence-level data, extremely sensitive Do not sequence all ...turning to next-generation sequencing options over older assays. Biased sequencing methods There are two ...Low-throughput, low sensitivity Sanger Sequencing Provided 20% (variable) Sequence-level data Low-throughput, inappropriate...is targeted amplicon sequencing. The information from targeted amplicon sequencing is highly sensitive ...edit rate and the repair product sequence. Targeted amplicon sequencing doesn’t tell the whole story ...require high sequencing read counts making them fast and viable options for multiplex sequencing in many laboratories...Athanasios C., et al. "Comparison of Sanger sequencing, pyrosequencing, and melting curve analysis for the detection...
Showing: 1 - 10 of 421 results