Next-Generation Sequencing Service—ABI 3730×L

Introduction

The ABI 3730×L sequencer, from ThermoFisher, is a high-throughput long-read Sanger sequencing instrument. For high quality DNA samples, it can determine about 850bp in a single read, and can read 96 samples simultaneously.
As with any Sanger sequencer, the 3730×L requires samples to be amplified using a single primer and fluorescently-tagged nucleotides. Whenever a tagged nucleotide is incorporated into a new strand, it prevents the polymerase from adding further bases; random incorporation of these tagged nucleotides as compared to untagged nucleotides results in a pool of oligos ranging in length from about 100bp to 1000bp long following PCR cleanup. Capillary electrophoresis on the 3730×L separates these oligos by length and draws them toward an optical system at the end of the capillaries. When the oligos of each consecutive length fluoresce under the laser, the respective intensities for each base's wavelength are recorded and the location is assigned a base call according to which wavelength has the highest intensity. The resulting output file is called a "trace file" (a portion of which displayed below), and the complete sequence it contains is the compilation of these calls.

Summary

The 3730×L is a 96-Capillary Array DNA sequencer used for DNA fragment analysis and traditional DNA sequencing. Provides quality data at a low cost per sample.

CD Genomics, as a specialist sequencing company, has a large range of sequencers in our NGS Core, including Illumina MiSeq, NovaSeq, PacBio, and more. If you require this service, please contact us directly.