The Premium PCR service is designed for full-length, fragmentation-free sequencing of linear, double-stranded DNA ranging from 100 bp to 25 kb. It serves as an enhanced alternative to the standard Linear/PCR service, which may introduce minimal fragmentation during library preparation.

When to Use Premium PCR:

  • Diverse Molecular Mixtures: Ideal if your linear DNA sample contains a mixture of molecules (e.g., barcode or variant libraries) that require comprehensive characterization.
  • Fragmentation-Free Reads: Suitable when you need full-length, end-to-end sequencing without any fragmentation.
  • High Read Count: Delivers up to 5,000 raw reads per sample, significantly exceeding the output of the standard Linear/PCR service.
  • Enhanced Accuracy: Provides raw reads with greater per-base confidence compared to the regular service.
  • Complete Data Retrieval: Includes all raw reads generated from your sample, not limited to those aligning with your consensus sequence. (Note: While all reads are returned, a small chance of demultiplexing errors exists, meaning a few reads from your sample might be shared with others in the same sequencing run.)

Technology and Workflow:

This service uses cutting-edge long-read sequencing technology from Oxford Nanopore Technologies and includes:

  1. Amplification-Free Library Preparation: Your input DNA is preserved intact, with no fragmentation, using the latest v14 library prep chemistry, including end-ligation for linear DNA.
  2. Sequencing with High Accuracy: Libraries are sequenced on R10.4.1 flow cells with a primer-free protocol, and raw data is provided in .fastq.gz format.
  3. Consensus Generation: Raw reads are aligned to produce a high-accuracy linear consensus sequence for the most abundant molecular species in your sample. For samples with multiple species, you can analyze the raw reads independently or request additional consensus sequences by contacting support@plasmidsaurus.com.

 ADD THE DATA FILE TYPES STUFF


Pricing

Description Catalog # Estimated data output Price per sample Turnaround time
Ligation Sequencing - Medium 3010-ONTLSM 200 Mbp Long Reads $240 3 business days
Ligation Sequencing - Large 3010-ONTLSL 400 Mbp Long Reads $315 3 business days
Ligation Sequencing - XL 3010-ONTLSXL Min 900 Mbp Long Reads $420 3 business days

 

 

Specifications

1. Preparing Samples for Premium Service

Premium PCR sequencing is based on the molarity of your DNA insert, therefore the required concentration (ng/uL) will vary depending on your insert size. Please send your samples at the minimum volume of 10 μl and at the target concentration specified in the table below:

Amplicon Size     DNA Concentration
100 bp 1 ng/μl
200 bp 2 ng/μl
500 bp 5 ng/μl
1000 bp 10 ng/μl
2000 bp 20 ng/μl
5000 bp 50 ng/μl
10000 bp 100 ng/μl
15000 bp 150 ng/μl
20000 bp 200 ng/μl
25000 bp 250 ng/μl

We do not currently support single-stranded DNA (ssDNA) for the premium service. While some customers choose to submit ssDNA, the outcomes are highly variable, and we cannot guarantee success. If you decide to send ssDNA, please note that it will be at your own risk.

  • Purified DNA: Submit your final purified linear DNA in either elution buffer (10 mM Tris, pH 8.5) or nuclease-free water. Avoid using buffers that contain DMSO, as they may interfere with the process. Unpurified samples risk failure and may incur additional purification fees.
  • Primer-Free Sequencing: Premium PCR does not require primers, so do not include primers in your shipment or mix them with your samples.

Important Notes:

  • Our competitive pricing and rapid turnaround times do not include DNA extraction or quality control (QC) services. Before shipping, ensure your samples meet all requirements through complete QC verification.

2. Verify Concentration

Prepare your Premium PCR samples at the target concentration and minimum volume specified in the table above. To ensure optimal results, we highly recommend quantifying your DNA using a Qubit or a comparable fluorometric method, such as a plate reader.

If you choose to use a spectrophotometric method like Nanodrop, please note that these methods are significantly less accurate for determining DNA concentration. Submitting samples that are either too concentrated or too dilute can negatively impact the library preparation and sequencing processes, potentially leading to sequencing failure. Incorrect sample concentrations—often resulting from Nanodrop measurements—are the most frequent cause of sequencing issues. Accurate quantification and normalization are critical to success!

 

3. Verify Quality

This service is specifically designed for linear double-stranded DNA molecules. We recommend verifying the size of your full-length linear DNA using gel electrophoresis.


4. Verify Purity

We recommend submitting samples with a 260/280 ratio above 1.8 and a 260/230 ratio between 2.0 and 2.2. Purity can be assessed using Nanodrop or similar spectrophotometric methods.

For optimal results, samples should not contain:

  • RNA: Include RNase treatment during extraction to eliminate RNA.
  • Denaturants or Detergents: Avoid substances like guanidinium salts, phenol, SDS, or Triton-X100.
  • Residual Contaminants: Remove impurities such as heme, humic acid, or polyphenols.
  • Insoluble Materials: Ensure samples are free of colors, cloudiness, or other insoluble substances.

For the convenience of our customers, Eurofins Genomics offers DNA extraction services utilizing ZymoBIOMICS DNA extraction kits. This protocol is capable of extracting DNA from various sample types, employing a bead bashing tube to ensure consistent mechanical lysis. However, this method may not be optimal for ONT sequencing, as the resulting read length is often influenced by the input quality.

Eurofins Genomics can accommodate all organisms up to BSL2+ for extraction services; however, we do not accept BSL3 or higher classified organisms.

For samples requiring DNA extraction, we accept aspirated cell pellets shipped frozen on dry ice or growth on sealed, nutrient agar plates shipped at ambient temperature. For microbial DNA isolation submissions, a minimum of 10910^9109 cells is recommended. Please note that we are unable to culture samples; therefore, we encourage you to ensure sample purity and adequate growth before shipping.

While this kit is broadly applicable to many sample types, we cannot guarantee its efficacy for every organism.

Interpreting Results

If you need help interpretation your results, please visit the results interpretation page.

“Your sequencing reactions were perhaps the turning point in my work. Obtaining such good quality reads is rare. I have submitted many samples but this is was the best, we should explore all variable associated with the success to make it reproducible, quality, quantity of DNA to reagents used at Eurofins.”

Shyam G

Shyam G

Customer

“We got the sequences back and are quite happy with the quality. One of the orders had amplicons that we have been sequencing routinely for many years and quality from Eurofins seems to be better. Also, our overall experience with Eurofins website, sample submission, email notifications and sequencing results was positive and user friendly. We are looking forward to sequencing with Eurofins.”

Anna M.

Anna M.

Customer

“This was really impressive. Cannot believe we can get full plasmid sequencing for $15 a pop. Greatly appreciated.”

Drake R. PhD

Drake R. PhD

Customer

“Whole Plasmid Sequencing is good service at a great price point that saves me time. A great addition to the sequencing toolkit that I will be using more in the future.”

Shane A

Shane A

Customer

“Beautiful sequences”

Dr. Dorothy E.

Dr. Dorothy E.

Customer

“Speed of analysis is exceptional!”

Adeleye A.

Adeleye A.

Customer

“I have to say, your sequencing is outstanding. From ease of drop off to rapid turn around, to your customer support people if I do have a question and call. I refer everyone to Eurofins. Thanks for doing a great job!”

Amy H.

Amy H.

Customer

“Incredibly fast turnaround, and the sequences are stellar. I’m really thankful for your services, they make my job much easier.”

Joseph D.

Joseph D.

Customer

“I am consistently surprised and pleased with how quickly you can provide sequencing data! I dropped my samples off late last evening at my local dropbox and my results were waiting in my inbox when I arrived at work this morning! My PI and I were just joking that we make a comment every time about how the results come so quickly. Maybe we just aren't used to such good customer service. Great job.”

Eva J.

Eva J.

Customer

“Love your service. You guys are my go to service, and I constantly recommend you to local folks who do sequencing.”

Daniel K

Daniel K

Customer

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ONT sequencing for bacterial samples

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