How does a DNA sequencing machine work?

Overview of DNA sequencers and their capability to read complete genomes from diverse sources including blood, plant material, microorganisms, and animal tissues like koala samples.

Extract DNA from tissue or biological specimens such as blood, saliva, or plant material using liquid handling robots to perform enzymatic and chemical reactions that prepare the DNA for sequencing.

Attach prepared DNA molecules to the surface of a glass slide or flow cell, the first step in the Illumina NovaSeq sequencing process.

Replicate the attached DNA molecules to form billions of small clusters on the flow cell surface, with each cluster containing identical DNA sequences ready for optical detection.

Monitor light signals emitted from DNA clusters during base incorporation, where each nucleotide (A, G, T, C) produces a unique fluorescent signal detectable by camera.

Process and decode the detected fluorescent signals from all clusters to produce the final DNA sequence data for each genomic region.

Demonstrate Oxford Nanopore MinION sequencing technology that monitors electrical current changes as DNA passes through a protein nanopore, enabling real-time portable genome analysis.

Present the advantages of portable sequencing devices for undergraduate students and field researchers, enabling accessible genome sequencing via laptop integration and real-time analysis in remote locations.