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EZ1&2 DNA Investigator Kit

For automated purification of DNA from forensic and HID samples on the EZ1 Adv XL or EZ2 Connect Fx Instruments


  • Highly efficient DNA yields from trace casework samples
  • Excellent removal of inhibitors
  • Optional TE elution and use of carrier RNA
  • Very high reproducibility with ready-to-use, prefilled forensic grade (ISO 18385) cartridges
  • Compatibility with the EZ2 Connect Fx and EZ1 Instrument series

Product Details

The EZ1&2 DNA Investigator Kit reproducibly automates purification of genomic DNA from reference and casework samples in human identity testing. The kit can be used with the EZ2 Connect Fx (1-24 samples), EZ1 Advanced XL (1–14 samples per run), EZ1 Advanced (1–6 samples per run), and BioRobot EZ1 (1–6 samples per run) instruments. Purification is fast and efficient. Purified DNA performs well in downstream analyses with high signal-to-noise ratios, such as quantitative PCR and STR analysis.

Please note: The EZ1 DNA Investigator Kit was renamed to EZ1&2 DNA Investigator Kit in autumn 2021.

The EZ2 Connect Fx features cardless protocols, expanded applications and remote connectivity options. Click here to learn more about the EZ2 Connect Fx, or contact your sales representative to discover how you can get an EZ2 Connect Fx for your lab.


More efficient yields for sensitive downstream analyses

The EZ1&2 DNA Investigator Kit provides optimized chemistries for automated DNA purification with more efficient yields. STR analysis shows higher peaks for more sensitive detection (see figure " Improved performance in STR analysis", see table "Relative STR peak heights with different protocols"). The higher peaks demonstrate the improved signal-to-noise ratio for highly sensitive detection and high performance in downstream applications. Comparison of peak heights in STR analysis showed recovery of 79% of the potential DNA yield (not shown). Optional elution in TE buffer gives comparable performance (see table "Relative STR peak heights with different protocols") and provides increased stability for long-term storage of small amounts of purified DNA. There were no dropouts (<50 relative fluorescent units for any of the 8 alleles investigated) for any of the samples processed (see table "Relative STR peak heights with different protocols").

Relative STR peak heights with different protocols
Experiment Kit and card Protocol Elution Relative peak height No. of dropouts
1 EZ1 DNA Tissue Kit and EZ1 DNA Forensic Card Trace Water 100% 0/8
1 EZ1 DNA Investigator Kit and Card Trace Water 176% 0/8
2 EZ1 DNA Investigator Kit and Card Trace Water 100% 0/8
2 EZ1 DNA Investigator Kit and Card Trace TE 116% 0/8
3 EZ1 DNA Investigator Kit and Card (200 µl) Trace Water 100% 0/8
3 EZ1 DNA Investigator Kit and Card (500 µl) Large-volume Water 203% (81% normalized to starting volume) 0/8
Easier handling of solid materials with "tip dance" protocol

In addition to the standard trace protocol, an optional, fully automated "tip dance" protocol can be used, where the filter-tip moves back and forth relative to the worktable platform while pipetting. This enables processing of solid materials, such as swabs, fabrics, blood discs, or cigarette butts, directly in the sample tube. There is no need for prior centrifugation to remove solid materials that could clog the tip (see flowchart " EZ1 DNA tissue trace and “tip dance” protocols"). The "tip dance" protocol simplifies handling and, in some cases, increases DNA yield with more efficient extraction of the sample (see figure " Easy and efficient processing of solid materials with the "tip dance" protocol").

Optimized protocol for larger sample volumes

A large-volume protocol enables fully automated processing of starting volumes up to 500 µl. This not only allows efficient DNA purification from dilute samples with low concentrations of DNA, such as diffuse stains, but also enables purification from samples that require larger volumes for thorough lysis. The ability to process larger sample volumes — with the same elution volume as the standard trace protocol — enables higher yields of more concentrated DNA for greater sensitivity in downstream applications (see figure " Higher yields of concentrated DNA with the large-volume protocol", see table "Relative STR peak heights with different protocols").

Efficient purification of low amounts of DNA

The EZ1&2 DNA Investigator Kit includes carrier RNA for increased efficiency. Carrier RNA enhances binding of DNA to the silica surface of the magnetic particles, especially if the sample contains low amounts of DNA (<1 ng). Published data suggest that addition of carrier RNA enables more efficient isolation of low amounts of DNA from forensic samples and may, for some sample types, provide improved DNA yields. Addition of carrier RNA to sample lysates did not interfere with downstream STR analysis. 

Equivalence testing

Results from equivalence testing show that the EZ2 Connect Fx provides excellent DNA yields across a range of input sample dilutions, similar to the EZ1 Advanced XL (see figure  Same excellent DNA yield when compared with the EZ1 Advanced XL). 

Easy protocol setup and handling

Easy access to dedicated pre-loaded human ID and forensics protocols is available via the intuitive touchscreen interface on the EZ2 Connect Fx. For the EZ1 Instrument series, the preprogrammed EZ1 Advanced XL DNA Investigator Card (for use with the EZ1 Advanced XL), EZ1 Advanced DNA Investigator Card (for use with the EZ1 Advanced) and EZ1 DNA Investigator Card (for use with the BioRobot EZ1) make setting up the purification protocols as easy as making a credit card transaction. Prefilled, sealed reagent cartridges in the EZ1&2 DNA Investigator Kit help to prevent human error during setup of the instrument and prevent contamination of buffers. By eliminating human error in reagent preparation and workstation setup, and by providing cross-contamination-free liquid handling, the EZ2 Connect Fx, EZ1 Advanced XL, EZ1 Advanced, and BioRobot EZ1 provide high levels of reliability and standardization.

Quality guaranteed

In accordance with QIAGEN's ISO-certified Quality Management System, each lot of EZ1&2 DNA Investigator Kits is tested against predetermined specifications to ensure consistent product quality. The EZ1&2 DNA Investigator Kit meets ISO 18385 requirements.

See figures


The EZ2 Connect Fx, EZ1 Advanced XL, EZ1 Advanced, and BioRobot EZ1 provide fully automated purification of genomic DNA using silica-coated magnetic particles. Magnetic-particle technology eliminates tedious centrifugation steps, and the easy-to-use instrument allows purification of 1-24 samples (EZ2 Connect Fx), 1-14 samples (EZ1 Advanced XL) or 1–6 samples (EZ1 Advanced and BioRobot EZ1) in a single run. The automatic sensor-controlled lock of the instrument door and the use of sealed reagent cartridges reduce the chances of environmental contamination.


Pretreated samples are loaded onto the instrument, and genomic DNA is purified in one step following the automated procedure. Genomic DNA is eluted, ready to use in all downstream applications.


The high-quality DNA obtained using the EZ1&2 DNA Investigator Kit is suited for human identity applications including forensics, kinship or paternity testing, and disaster victim identification, and is used in techniques such as:

  • STR and SNP genotyping
  • DNA quantitation
  • Next-generation sequencing in human identification

Supporting data and figures


ApplicationsPCR, real-time RT-PCR, genotyping
Main sample typeForensic samples
For automated processingEZ2 Connect Fx, EZ1 Instrument series
Sample amount<500 µl
TechnologyMagnetic particles
FormatSample tube
Purification of total RNA, miRNA, poly A+ mRNA, DNA or proteinDNA
Yield150–250 ng
Elution volume50–200 µl; EZ2 offers optional reduced elution volumes of 20–30 µl


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