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DNA Isolation01:24

DNA Isolation

DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...

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Related Experiment Video

Updated: Jul 17, 2026

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers
10:17

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers

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Preserving Shell Integrity of Microgastropods With the Nondestructive HotSHOT DNA Extraction Method.

Nina Tombers1,2, Cristina Vasilița1,3,4, Ira Richling1

  • 1Stuttgart State Museum of Natural History Stuttgart Germany.

Ecology and Evolution
|July 16, 2026
PubMed
Summary

DNA extraction from small, preserved gastropods is now easier. The HotSHOT method efficiently extracts DNA without damaging shells, aiding species discovery and conservation efforts.

Keywords:
DNA barcodingMolluscamolecular methodspecies‐level identificationvoucher

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Area of Science:

  • Zoology
  • Molecular Biology
  • Conservation Science

Background:

  • Gastropods represent a highly diverse animal class, with microgastropods comprising a significant portion.
  • Extracting DNA from preserved microgastropods is difficult due to their small size and retracted state within shells.
  • Traditional DNA extraction methods often result in shell damage, compromising valuable type specimens.

Purpose of the Study:

  • To evaluate the HotSHOT alkaline lysis method for nondestructive DNA extraction from small, ethanol-preserved gastropods.
  • To assess the suitability of extracted DNA for DNA barcoding (COI gene amplification).
  • To determine the method's effectiveness in preserving shell integrity and associated structures.

Main Methods:

  • The HotSHOT alkaline lysis protocol was applied to preserved microgastropod specimens.
  • DNA extraction involved a brief lysis step at high pH and temperature.
  • Extracted DNA was used for polymerase chain reaction (PCR) amplification of the COI gene for barcoding.

Main Results:

  • The HotSHOT method successfully yielded DNA suitable for COI barcoding in 76% of samples.
  • 85% of the obtained sequences were of sufficient quality for species identification.
  • Shell integrity and periostracal structures were preserved, and success rates were higher when buffer access was facilitated for specimens with closed opercula.

Conclusions:

  • HotSHOT is a fast, inexpensive, and non-damaging DNA extraction technique for microgastropods.
  • This method facilitates large-scale barcoding and species discovery, especially for rare or valuable specimens.
  • The technique supports biodiversity assessments, species delimitation, and conservation initiatives by enabling efficient molecular analysis of small gastropods.