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Low Binding Microplates

Low DNA Binding Plates for Next Generation Sequencing (NGS) & Other Sensitive Applications

Polypropylene (PP) is the best plastic material for PCR tubes as it is chemically inert, resistant to solvents, and well suited for injection molding - allowing for production of thin-walled tubes for optimum PCR results.

DNA has been shown to bind to PP tubes especially at high ionic strength, despite the very hydrophobic nature of this material. Different PP polymers are used for the production of PCR consumables and as they differ in their characteristics including surface charges, they consequently bind DNA in varying amounts.

DNA binding to PP surfaces has typically only been an issue for reaction tubes and storage vessels but not for PCR/qPCR tubes. DNA sticking to tube walls is either released during denaturation steps and/or remains accessible for amplification.

Nevertheless, as miniaturization continues to advance and new technologies like Next Generation Sequencing (NGS) emerge, PCR/qPCR tubes are increasingly being recommended for additional applications that demand ultra-low DNA binding.

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Jump to:
  • All Low DNA Binding Plates
  • Key Features
  • Experimental Data

All Low DNA Binding Plates

4titude is now Azenta Life Sciences

4ti-0384 | FrameStar 384 Well Skirted PCR Plate | Front

FrameStar® 384 Well Skirted PCR Plate

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Polypropylene wells, polycarbonate frame, cut corner A24; working volume: <30µl, total well capacity: 55µl; designed for use on standard thermal cyclers

4ti-0960 | FrameStar 96 Well Skirted PCR Plate | Front

FrameStar® 96 Well Skirted PCR Plate

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Low profile, 0.1ml polypropylene wells, polycarbonate frame, cut corner H1; working volume: <100µl, total well capacity: 200µl

4ti-0770/R | FrameStar 96 Well Semi-Skirted PCR Plate, ABI® Style | Front

FrameStar® 96 Well Semi-Skirted PCR Plate, ABI® Style

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Standard profile, 0.2ml polypropylene wells, polycarbonate frame, cut corner A12; working volume: <200µl, total well capacity: 300µl

4ti-0147 | 384 Square Deep Well Storage Microplate | Front

384 Square Deep Well Storage Microplate

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190µl square wells, V shaped bottom, clear polypropylene

4ti-0110 | 96 Round Well Microplate (300 µl wells, U-shaped) | Front

96 Round Well Storage Microplate

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200µl, 300µl, 330µl or 350µl round wells, U or V shaped bottom, clear PP; also available as a low binding plate with ultra-low DNA binding properties

4ti-0125 | 96 Round Deep Well Storage Microplate, For Magnetic Separators | Front

96 Round Deep Well Storage Microplate, For Magnetic Separators

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1.00ml round wells, V-shaped bottom, clear polypropylene; also available as low binding plate with ultra-low DNA binding properties

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Key Features

  • Low binding feature results from selected low-bind polymers, no coating is used to achieve the binding characteristics
  • No contamination or modification of the samples
  • Tested under a broad temperature range
  • Maximum DNA recovery after low temperature storage and high temperature incubation
  • No DNA loss during incubation steps and sample transfer in NGS sample prep and library construction
  • Ideally suited for sensitive applications with ultra-low DNA input
  • Free from DNase, RNase, human genomic DNA, and endotoxin/pyrogen
  • All skirted and semi-skirted microplates are available barcoded on request; learn more about our coding options

Experimental Data

  • Binding of Linear DNA to Different PP Polymers

    Figure 1
    Figure 1 (click on image to expand)

    Figure 1

    Experimental set-up

    A tenfold DNA dilution series was created containing a linear 1176bp product (digested from plasmid ACTA1, TA cloned into the pGemT vector) resulting in DNA concentrations of 10ng/µl, 1ng/µl, 0.1ng/µl, and 0.010ng/µl.

    50µl of each DNA concentration were applied to a PCR plate and incubated for 30 minutes at 37°C. The DNA was afterwards transferred to the next row of the PCR plate for additional 30 minute incubation. This procedure was repeated seven times so that the DNA was incubated in 8 different tubes for a total of 240 minutes. All transfer steps were performed with commercially available low-binding tips (Corning).

    2µl of each DNA concentration were subsequently subjected to qPCR analysis and compared to 2µl of the original dilution series (total DNA input = 2ng to 0.002ng per qPCR run) using ACTA1 primer and probe set designed by IdT (Integrated DNA Technology).

     

    Experimental results

    Three different PCR plates were compared:
    a) a PCR plate with tubes made of the Azenta low binding PP polymer
    b) a PCR plate with tubes made of an alternative PP polymer and
    c) a commercially available low-binding plate from competitor E

    Figure 2 shows Ct values obtained from the different DNA concentrations. The blue line shows the results for the control DNA not incubated in PCR tubes, the red line shows the results for DNA incubated in PCR tubes as described. The ΔCt is shown in green.

    The red and the blue line should be identical (with ΔCt = 0) for plastic material which does not bind any detectable traces of DNA (minor differences may result from pipetting inaccuracies). The Azenta low-binding material (a) shows almost an ideal pattern, the only small deviation from optimum results is a minor ΔCt of 0.44 cycles for the lowest DNA concentration of 0.002ng/µl.

    Figure 2
    Figure 2 (click on image to expand)

    Figure 2

    The alternative in-house PP polymer (b) tested in parallel revealed a significant DNA binding with a ΔCt of up to 2.57 cycles for the lowest DNA concentration. A surprisingly similar pattern with a ΔCt of up to 2.92 cycles was received from commercially available “low-binding” PCR plates from Competitor E (c). The results clearly show the superior performance of the Azenta low binding PP polymer indicating the advantages for sensitive applications such as Next Generation Sequencing sample preparation.

  • Binding of Genomic DNA to Low Binding PP Polymer at Different Temperatures

    Figure 3
    Figure 3 (click on image to expand)

    Figure 3

    Further experiments were performed with the Azenta low binding PP polymer.

    The experiment described above was repeated with identical experimental conditions using mouse genomic DNA (dissolved in 5mM Tris-HCl pH 8.0) instead of the ACTA1 fragment testing three different incubation temperatures (4°C as a typical storage temperature for reaction mixtures, 37°C as a typical temperature for enzyme reactions, and 65°C as a typical temperature for enzyme denaturation). qPCR comparisons were performed with identical DNA concentrations using KAPA SYBR Fast qPCR Master Mix.

    Figure 3 shows an exemplary standard curve taken from the 4°C incubation showing the Ct value for 4 different input concentrations for incubated samples versus controls. The results for other temperatures were comparable.

    Table 1 shows the Ct values for all different experimental conditions - confirming almost no differences between samples incubated in 8 different tubes for a total of 240 minutes and the control not subjected to PCR plastic surfaces.

      Ct value Ct SD ΔCt
    Incubation temperature: 4 °C
    20 ng/rxn without incubation 19.97 without incubation 0.01 -0.2
    after incubation 19.77 after incubation 0.01
    2 ng/rxn without incubation 22.93 without incubation 0.08 -0.06
    after incubation 22.87 after incubation 0.05
    0.2 ng/rxn without incubation 26.44 without incubation 0.03 -0.06
    after incubation 26.38 after incubation 0.05
    0.02 ng/rxn without incubation 29.61 without incubation 0.14 0.25
    after incubation 29.86 after incubation 0.10
    Incubation temperature: 37 °C
    20 ng/rxn without incubation 19.85 without incubation 0.02 -0.21
    after incubation 19.64 after incubation 0.05
    2 ng/rxn without incubation 22.93 without incubation 0.06 -0.16
    after incubation 22.77 after incubation 0.05
    0.2 ng/rxn without incubation 26.28 without incubation 0.03 0.10
    after incubation 26.37 after incubation 0.05
    0.02 ng/rxn without incubation 29.49 without incubation 0.45 0.08
    after incubation 29.57 after incubation 0.36
    Incubation temperature: 65 °C
    20 ng/rxn without incubation 18.51 without incubation 0.04 -0.73
    after incubation 17.78 after incubation 0.01
    2 ng/rxn without incubation 21.41 without incubation 0.003 -0.16
    after incubation 21.26 after incubation 0.02
    0.2 ng/rxn without incubation 24.69 without incubation 0.13 -0.18
    after incubation 24.51 after incubation 0.03
    0.02 ng/rxn without incubation 28.57 without incubation 0.23 -0.42
    after incubation 28.15 after incubation 0.56

    Table 1: Binding of genomic DNA to low binding PP polymer at different temperatures - Ct values for all different experimental conditions

    Experimental data: the data comparing DNA adhesion at different temperatures was kindly provided by our Japanese cooperation partner Nippon Genetics.

 

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