Fast and Accurate Probe Selection Algorithm for Large Genomes

  • Authors:
  • Wing-Kin Sung;Wah-Heng Lee

  • Affiliations:
  • -;-

  • Venue:
  • CSB '03 Proceedings of the IEEE Computer Society Conference on Bioinformatics
  • Year:
  • 2003

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Abstract

The oligo microarray (DNA chip) technology in recentyears has a significant impact on genomic study. Manyfields such as gene discovery, drug discovery, toxicologicalresearch and disease diagnosis, will certainly benefitfrom its use. A microarray is an orderly arrangement ofthousands of DNA fragments where each DNA fragment isa probe (or a fingerprint) of a gene/cDNA. It is importantthat each probe must uniquely associate with a particulargene/cDNA. Otherwise, the performance of the microarraywill be affected. Existing algorithms usually select probesusing the criteria of homogeneity, sensitivity, and specificity.Moreover, they improve efficiency employing some heuristics.Such approaches reduce the accuracy. Instead, wemake use of some smart filtering techniques to avoid redundantcomputation while maintaining the accuracy. Basedon the new algorithm, optimal short (20 bases) or long (50or 70 bases) probes can be computed efficiently for largegenomes.