Viral Controls

PRODUCTS

Synthetic Viral Controls

Synthetic Viral Controls

Trusted Controls for Diverse Applications

In the wake of the global demand for diagnostic tests amid the Coronavirus pandemic, laboratories worldwide seek reliable tools for detecting SARS-CoV-2 and Respiratory viruses across various sample types. Our controls offer a trusted solution to address the expanding need for testing, ensuring accuracy and safety in a wide range of applications.

Ensuring Reproducible, High-Quality Results

Positive controls play a pivotal role in maintaining quality standards for diagnostic assays, spanning from development to day-to-day testing. These controls facilitate the verification and validation of diagnostic tests, supporting both next-generation sequencing (NGS) and reverse transcription polymerase chain reaction (RT-PCR) assays, ensuring reproducibility and reliability.

Safe and Effective Alternatives to “Live Virus”

Concerns regarding safety and security associated with controls based on viral nucleic acids extracted from infected patients or live virus cultures led us to develop synthetic controls through gene synthesis. These alternatives offer a safe and effective solution, allowing broader access to diverse strains while mitigating potential risks.

Flexible Formulations for Varied Needs

Tailor your approach with our flexible control formulations—Standard, Assay Ready, or Encapsulated. Whether in a frozen liquid, dried pellet, or encapsulated dried pellet form, our controls provide options for shipping, storage, and stability, meeting the unique requirements of your applications. Ambient shipping reduces costs and enhances accessibility for researchers globally, making our controls a reliable choice in the dynamic landscape of diagnostic testing.

RESPIRATORY VIRUS CONTROLS

Comprehensive Controls for Respiratory Virus Research

Twist’s Synthetic Respiratory Virus Controls encompass a wide spectrum of RNA and DNA viruses crucial for respiratory disease studies. Aligned with the Twist Respiratory Virus Research Panel (PN 103067), these controls seamlessly integrate into Twist Fixed Panel NGS workflows, as well as RT-PCR or qPCR experiments designed by users.

Navigating the Viral Landscape

Refer to the taxonomic tree in the accompanying figure for a visual representation of the viruses covered by Twist Respiratory Virus Controls. The table provides GenBank IDs, virus types, and lengths for each control, facilitating an in-depth understanding of the viral landscape. Custom synthesis options are also available—connect with your local sales representative for additional details.

Simplify Your Research Journey

For further information or to make a purchase, contact your local sales representative or conveniently “Buy Now.” Twist’s Synthetic Respiratory Virus Controls offer a robust foundation for respiratory virus research, enhancing the precision and reliability of your experiments.

SARS-COV-2 CONTROLS
SARS-COV-2 CONTROLS

Elevating Quality Control with Twist Synthetic RNA Controls for SARS-CoV-2

Twist Bioscience offers synthetic RNA controls designed for diverse viral genomes, including SARS-CoV-2. With six non-overlapping 5 kb fragments transcribed into ssRNA, these controls provide over 99.9% genome coverage. Available in standard, Assay Ready, and Encapsulated Formats, they cater to various needs with concentrations tailored for flexibility.

Unique Stability in Encapsulated Controls

Twist’s Encapsulated Controls, sealed in a metal capsule around a desiccated pellet, ensure enhanced stability. With room temperature shipping and a five-year shelf life, these controls provide cost-effective and globally accessible solutions.

Contribution to Multiplex Assay Development

The Twist Assay Ready Synthetic SARS-CoV-2 RNA Control, developed with the US CDC, enables simultaneous testing for influenza A, B, and SARS-CoV-2. Originally designed for authorized laboratories, it is now available to customers outside the CDC.

Best Practices and Regulatory Considerations

For comprehensive guidance on storage and use of controls, refer to provided documents: Twist Assay Ready Synthetic Controls Storage and Use Document and Twist Sars-CoV-2 Encapsulated RNA Control Storage and Handling Guide.

Note: This product is authorized for emergency use by the FDA under an EUA for the detection of SARS-CoV-2 nucleic acid. The emergency use is limited to circumstances justifying the authorization.

SARS-COV-2 CONTROLS
MONKEYPOX CONTROLS

Twist Synthetic hMPXV Controls: Precision for Targeted Research

Twist’s Synthetic Human Monkeypox Virus (hMPXV) Controls, representing CB and WA clades, cover over 80% of the viral genome. Validated for custom assays and compatible with CDC-recommended PCR procedures, these controls, in two variants, offer precise tiling of the genome at 900bp intervals. With concentrations at approximately 100,000 copies/uL, they provide accuracy and reproducibility. Contact your local sales representative for more information.

Note: The Twist Synthetic hMPXV Controls are not ISO-13485 certified.

Monkeypox control by Twist Bioscience
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Synthetic Controls Portfolio

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    cfDNA Pan-cancer Reference Standards

    Twist cfDNA Pan-Cancer Reference Standard v2

    The Twist cfDNA Pan-Cancer Reference Standard v2 is a meticulously engineered tool tailored for genomics professionals developing and validating NGS-based liquid biopsy assays. This reference standard provides a reliable and reproducible resource for detecting clinically relevant variants, enabling researchers to confidently evaluate assay performance at every stage. By integrating a wild-type (WT) cell-free DNA (cfDNA) background with synthetic oligonucleotides carrying mutant alleles, the material delivers exceptional precision and sensitivity.

    Researchers can leverage this standard to define critical analytical parameters, including the Limit of Detection (LoD) and Limit of Blank (LoB), ensuring robust assay calibration and quality control. Ideal for both early-stage assay development and ongoing process monitoring, the Twist cfDNA Pan-Cancer Reference Standard v2 empowers genomics teams to accelerate liquid biopsy innovation while maintaining rigorous accuracy and reproducibility.

    But... Why These Panels?

    Comprehensive Detection of Cancer Variants

    458 unique naturally occurring cancer variants

    132 clinically relevant variants

    Covers 84 different genes involved in cancer

    Better Design of Background
    DNA

    Background DNA derived from human cfDNA samples

    DNA size profile and post-sequencing profile mimic native cfDNA

    Designed for Precision and Flexibility

    Seven individual VAF percentages to choose from

    Digital Droplet PCR verification of VAF percentages

    Convenient test set of all VAF percentages available

    Download Product Sheet, Data Files & Detailed FAQs

    Unlock instantly with few steps.

      Data To Back This Up

      Fragment Profile Comparison: Twist vs. Competitors

      Twist cfDNA Pan-Cancer Reference Standard v2 closely mimics the fragment size distribution of native cfDNA, including distinct mononucleosomal and dinucleosomal peaks. When compared to competitor reference materials standardized for peak height, Twist’s standards provide a more biologically accurate representation of circulating cell-free DNA, supporting realistic assay development and reliable performance benchmarking.

      Schematic of Synthetic Variant DNA Design

      Twist’s synthetic variant DNA is engineered to tile across each genomic locus with extensive overlap, ensuring high coverage and diverse fragment representation. This design captures the variant in multiple positions relative to the DNA termini, providing realistic fragment diversity and enabling more accurate assay performance assessment.

      Background Mutation Rate Comparison

      Background mutation rate measures the occurrence of non-germline variants in duplex consensus reads from target-enriched wild-type samples. Analysis across Twist cfDNA Pan-Cancer Reference Standard v2, native cfDNA, competitors, and Twist v1 shows that v2 closely matches the low background error rate of native cfDNA. Its superior fidelity—lower than both v1 and competitor standards—is achieved through a high-precision production process, ensuring more reliable and accurate assay benchmarking.

      INDEL Size Distribution

      The Twist cfDNA Pan-Cancer Reference Standard v2 includes a wide range of insertion and deletion (INDEL) sizes, from deletions of 30 bp to insertions of 15 bp. Visualized as a histogram (bin width = 1), this distribution allows researchers to comprehensively evaluate INDEL detection performance across diverse fragment lengths. Single nucleotide variants (SNVs) are not included in this visualization, highlighting the standard’s focus on structural variant representation and assay sensitivity testing.

      Variant Calling in Target Enrichment Workflows

      Twist cfDNA Pan-Cancer Reference Standards deliver highly accurate variant detection across a range of variant allele frequencies (VAFs). Using a custom panel targeting 215 SNVs and sequencing to 80,000× raw coverage before UMI deduplication, the observed mean VAFs closely match the intended levels. This precision allows researchers to confidently benchmark and validate their NGS-based assays, ensuring reliable performance across the full spectrum of variant frequencies.

      Related Products

      Twist UMI Adapters

      Detect low freqency variants from cfDNA with unique molecular IDs (UMIs).

      MRD Rapid 500 Panels

      A scalable target enrichment solution for monitoring minimal residual disease.

      Custom Panels

      User-designed target enrichment panels for targeted NGS.

      Product SKUS

      107576: Twist cfDNA Pan-Cancer Reference Standard v2 Set, 300ng kit

      107577: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0% (WT), 3 ug

      107578: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0.1%, 3 ug

      107579: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0.25%, 3 ug

      107580: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0.5%, 3 ug

      107581: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 1%, 3 ug

      107582: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 2%, 3 ug

      107583: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 5%, 3 ug

      107584: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0%, 600ng

      107585: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0.1%, 600ng

      107586: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0.25%,600ng

      107587: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 0.5%, 600ng

      107588: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 1%, 600ng

      107589: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 2%, 600ng

      107590: Twist cfDNA Pan-Cancer Reference Standard v2 VAF 5%, 600ng

      *Kit includes 7 VAFs individually: 0% (WT), 0.1%, 0.25%, 0.5%, 1%, 2%, 5% at 300ng each tube

      *For research use only. Not for use in any diagnostic or clinical procedures.

      Chris Wicky

      Clinical Genomics Manager - ANZ
      & Country Manager - NZ

      For support integrating the Twist cfDNA Pan-Cancer Reference Standards into your workflows, Decode Science offers personalized guidance and local expertise to help you maximize assay performance and streamline your liquid biopsy development.
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