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The use of tailed octamer primers for cycle sequencing
S Ball1, M A Reeve, P S Robinson
1Nycomed Amersham plc, Amersham Laboratories, White Lion Road, Amersham, Buckinghamshire HP7 9LL, UK.
Nucleic Acids Research
|November 4, 1998
Summary
Adding 5-nitroindole tails to octamer oligonucleotides significantly enhances cycle sequencing reactions. This modification, particularly with three or four residues, boosts signal intensity for improved DNA sequencing results.
Area of Science:
- Molecular Biology
- Biochemistry
- Genomics
Background:
- Cycle sequencing reactions are crucial for DNA analysis.
- Primer design impacts sequencing efficiency and signal strength.
- Octamer oligonucleotides are commonly used primers.
Purpose of the Study:
- To investigate the effect of 5-nitroindole base analogue tails on octamer oligonucleotide primers.
- To optimize primer performance in cycle sequencing reactions.
- To evaluate the utility of tailed primers for primer walking.
Main Methods:
- Synthesis of octamer oligonucleotides with varying 5-nitroindole tail lengths.
- Application of these modified primers in cycle sequencing reactions.
- Analysis of sequencing signal intensity and primer performance.
Main Results:
- 5-Nitroindole tails improved the performance of octamer primers in cycle sequencing.
- A tail length of three or four 5-nitroindole residues significantly increased sequencing signal intensity.
- The effectiveness of the tails was observed across most tested primers.
Conclusions:
- 5-Nitroindole-tailed octamer oligonucleotides represent a promising advancement for cycle sequencing.
- Optimized primer design can lead to enhanced DNA sequencing data quality.
- The use of incomplete libraries with these tailed primers warrants further investigation for primer walking applications.