Journal article
Methods for ensuring the highest dna concentration and yield in future and retrospective trace dna extracts
Science & Justice, Vol.61(2), pp.193-197
2021
Abstract
In forensic laboratories, increased extraction efficiency of trace evidence is paramount because analytical success is intrinsically dependent on the quantity of DNA recovered. Moreover, highly concentrated nucleic acids are vital for effective downstream analysis and high quality results. This study investigated the efficiency of extraction with the Qiagen® QIAamp® DNA Investigator kit, and explored improvements to the methodology that would maximise the recovery of low concentration forensic samples. Controlled amounts of starting cellular material were used to mimic trace (or low level) DNA deposits prior to DNA extraction with the Investigator kit. Addition of the provided carrier RNA along with conducting two successive elutions of 50µL improved the net recovery of DNA to 95%. Concentration with centrifugal filters post-extraction were able to concentrate DNA but a large net loss was observed. For the concentration of historic, retrospectively extracted DNA, centrifugal methods are able to concentrate DNA extracts previously too dilute for analysis. These concentrated volumes, however are small, allowing for minimal downstream analysis attempts before the sample is exhausted.
Details
- Title
- Methods for ensuring the highest dna concentration and yield in future and retrospective trace dna extracts
- Authors/Creators
- K. Dilley (Author/Creator) - Murdoch UniversityF. Pagan (Author/Creator) - Australian Federal PoliceB. Chapman (Author/Creator) - Murdoch University
- Publication Details
- Science & Justice, Vol.61(2), pp.193-197
- Publisher
- Elsevier B.V.
- Identifiers
- 991005541563207891
- Copyright
- © 2020 The Chartered Society of Forensic Sciences.
- Murdoch Affiliation
- School of Medical, Molecular and Forensic Sciences
- Language
- English
- Resource Type
- Journal article
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