---
title: Circulating Tumor DNA Reference Materials
description: Seraseq ctDNA Reference Materials are now available, as a plasma-like material for tracking the performance of 9 actionable cancer 'driver' mutations.
image: https://blog.seracare.com/hubfs/Imported_Blog_Media/ctDNA_Blend.jpg
---

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# Circulating Tumor DNA Reference Materials

Posted by [Dale Yuzuki](https://blog.seracare.com/ngs/author/dale-yuzuki) on Mar 24, 2016 12:00:00 AM

## ![ctDNA_Blend.jpg](https://blog.seracare.com/hs-fs/hubfs/Imported_Blog_Media/ctDNA_Blend.jpg?width=300&name=ctDNA_Blend.jpg "ctDNA_Blend.jpg")

Circulating tumor DNA detection by real-time quantitative PCR, digital PCR, or next-generation sequencing has garnered an abundance of scientific and commercial interest. [We have written before](https://blog.seracare.com/Home/TabId/294/ArtMID/989/ArticleID/20/Circulating-tumor-DNA-liquid-biopsy-needs-reference-standards.aspx)about the critical need for standards and reference materials for this emerging translational oncology research and applied domains and we are pleased to [report the launch of the Seraseq Circulating Tumor DNA Reference Materials](http://www.laboratorynetwork.com/doc/seracare-launches-circulating-tumor-dna-reference-materials-for-ngs-0001).

### A reproducible and consistent source of reference materials

Manufactured through a similar process to our existing Seraseq Trisomy 21 Aneuploidy Reference Material, the Seraseq Circulating Tumor DNA-I Reference Material is comprised of a set of nine actionable ‘driver’ oncology mutations that are blended at a precise allele-frequency ratio to GM24385 human reference DNA, fragmented to approximately 170 base-pairs, stabilized via a patent-pending method, and mixed into a human plasma-like matrix. These products are offered at varying allele frequencies (5%, 1.2%, 0.6%, 0.1% and WT for ‘wild-type’ or 0%) as 5mL of material, with at least 60ng of extractable DNA per vial.

The Seraseq Circulating Tumor DNA-I Reference Material (AF5, AF1.2, AF0.6, AF0.1 or WT) serves as an ideal reference material to assist with control of the full-process, starting from nucleic acid extraction through assay (whether RT qPCR, digital PCR, or NGS-based) and analysis, to track and monitor your laboratory’s daily assay performance.

### Purified material for assay development

The promise of circulating tumor nucleic acids,[in a recent review from the Association for Molecular Pathology](https://www.ncbi.nlm.nih.gov/pubmed/25908243), states “more trials are required to validate the clinical utility of precise molecular markers for a variety of tumor types”. There are a number of assay development efforts underway, from both academic and commercial organizations.  To assist with these efforts, SeraCare has also made purified nucleic acids available; the Seraseq Circulating Tumor DNA-I Mutation Mix (AF5-WT) is a set of five vials of purified, fragmented DNA for assay development and optimization.

More information about these products is [available online](http://precisionmedicine.seracare.com/products/seraseq-circulating-tumor-dna-1.html), and [feel free to contact us here](http://precisionmedicine.seracare.com/contact.html)or via the comments below.

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