[Study on factors influencing DNA sequencing by automatic genetic analyzer]

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• Accurate DNA sequencing is crucial for genetic research and diagnostics.
• Optimizing reagent use and purification methods can reduce costs and improve efficiency.
• The ABI3500xl genetic analyzer is a widely used platform for DNA sequencing.

Purpose of the Study:

• To determine the optimal dilution of BigDye for cost-effective and accurate DNA sequencing using the ABI3500xl analyzer.
• To evaluate the efficacy of different purification methods for sequencing PCR products.

Main Methods:

• BigDye reagent was diluted to 8, 16, and 32 times for PCR product sequencing.
• Three purification methods were assessed: CENTRI-SEP kit, BigDye cleaning beads, and ethanol-NaAc-EDTA.
• DNA sequencing was performed on an ABI3500xl automatic genetic analyzer.

Main Results:

• Accurate sequencing results were obtained with BigDye dilutions up to 16 times.
• A 32-fold dilution of BigDye led to misreading of nucleic acid bases.
• All three purification methods yielded acceptable sequencing results.
• CENTRI-SEP was fastest but most expensive; ethanol-NaAc-EDTA was most economical but slowest; BigDye beads offered moderate time and throughput.

Conclusions:

• Diluting BigDye up to 16 times is recommended for optimal DNA sequencing on the ABI3500xl.
• The choice of purification method should balance cost, time, and throughput requirements based on laboratory conditions.