Bioprocessing and clarification

DNase for Viscosity Reduction: Cofactors, Mixing and Filtration

Use DNase trials to investigate DNA-related viscosity and filtration. Check cofactors, chelators, mixing and target-product recovery with matched controls.

Prepared by Scientific & Technical Updated 23 September 2026
DNase for Viscosity Reduction: Cofactors, Mixing and Filtration

Choose the right enzyme

FeedstockProcessing targetEnzyme to investigateWhat to measure
DNA-rich lysateReduce molecular-length effectsDNaseViscosity and DNA fragmentation
Chelator-containing matrixRestore a compatible environmentGrade-specific cofactor reviewMeasured activity in the matrix
Clarification feedImprove useful throughputDNase followed by separationFilter performance and product recovery

These comparisons identify useful development endpoints; they are not universal dose or operating-condition recommendations.

Plan the process

  1. 1

    Prepare matched samples

    Divide one homogeneous process sample into matched untreated and DNase-treated portions.

  2. 2

    Check cofactors

    Check cofactor availability and compatibility using the supplied preparation’s technical information.

  3. 3

    Measure DNA and viscosity

    Track viscosity under fixed measurement conditions together with a relevant DNA assay.

  4. 4

    Test filtration

    Run the intended clarification step and compare throughput, residual DNA and target-product recovery.

DNase can reduce DNA-related viscosity by cleaving long DNA molecules into shorter fragments. It is most useful when DNA is a demonstrated processing limitation. A viscosity change alone does not establish complete DNA removal or satisfactory product recovery.

Confirm that DNA is the limitation

Cell disruption can release long DNA that increases viscosity and complicates mixing or clarification. Compare a DNase treatment with a matched process-only control, recording shear and dilution because both can change the measurement. If polysaccharides, proteins or suspended solids dominate the resistance, DNA cleavage may give little improvement. Use a DNA-related analytical endpoint alongside a viscosity measurement made under consistent conditions.

Check cofactors and competing ingredients

The current product information identifies magnesium and calcium requirements. Confirm the grade-specific instructions, then review chelators such as EDTA and other matrix components that can affect available ions or enzyme activity. Do not transfer a buffer recipe from a different DNase preparation without verification. Check compatibility with the desired product and downstream purification, and confirm any required RNase-free or other purity specification separately.

Test filtration and recovery directly

Shorter DNA fragments can remain in solution after viscosity falls. Measure the relevant residual-DNA endpoint if removal is required, and evaluate the actual filter or separation step. Record throughput, pressure behaviour, clarity and target-product recovery. DNase treatment is not sterilisation, and improved flow does not establish microbial control. Validate any stopping or removal step needed before the next process operation.

Troubleshooting

  • A control substrate responds but the process sample does not: examine chelators and matrix inhibition.
  • Viscosity falls without improved filtration: investigate particles, filter fouling and other flow limitations.

Common questions

Does lower viscosity mean DNA has been removed?

No. Cleaved fragments may remain. Removal needs an appropriate downstream process and residual-DNA measurement.

Can I assume this preparation is RNase-free?

No. Obtain the specification required by your workflow rather than inferring it from the DNase name.

Evidence and scope

These are proposed development comparisons, not validated production recipes or guaranteed performance results. Use current grade-specific technical data for the starting dose and operating conditions. Record the enzyme lot and assay definition, and confirm performance in the finished process before scale-up.

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Process development and supply

Share your feedstock, batch size, temperature and pH profile, treatment time and target specification with Scientific & Technical. Select a relevant product below to see current pack sizes, price and availability, and buy online. For blends and kits, confirm the component selection and conditions against your intended application.

Follow each preparation’s technical and safety data sheets, including storage and handling instructions. Avoid generating enzyme dust or aerosols.

Recommended products

Choose the products that match your process. Each card explains its role in this application; you do not need every enzyme in one recipe.

DNase
Bioprocess clarification

DNase

Target DNA-related viscosity

  • Check matrix compatibility and cofactor availability
  • Measure filtration gains and product recovery

From £128.99

View sizes & buy

Benefits are application targets; confirm dosage and performance in your finished formulation.

References and supporting evidence

Research and manufacturer examples support the application rationale; they do not establish identical performance for every commercial preparation.

  1. IUBMB enzyme nomenclature — EC 3.1.21.1

    Reaction classification supporting the mechanism discussed; a family example where applicable, not confirmation of the supplied preparation’s exact activity profile or process settings.

  2. Scientific & Technical — DNase

    Current product information; confirm the technical sheet, intended-use documentation and lot specification for the supplied preparation.