Basics on microarrays - PowerPoint PPT Presentation

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Basics on microarrays

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Basics on microarrays. Concepts of cDNA, mRNA, dyes, probes, hybridization, ... How to resolve the errors and bias introduced by the microarray experiment ... – PowerPoint PPT presentation

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Title: Basics on microarrays


1
Basics on microarrays
  • Concepts of cDNA, mRNA, dyes, probes,
    hybridization,
  • cDNA array, Affymatrix array
  • How to resolve the errors and bias introduced by
    the microarray experiment
  • Typical pre-processing procedures
  • Procedures specially designed for cDNA and
    Affymatrix
  • Procedure common to both platforms

2
Analysis of differentially expressed genes
  • Parametric statistics t-tests
  • Paired or one-sample t-test
  • Unpaired or two-sample t-test
  • Bootstrap analyses for sample distribution
  • Calculation of p-value from bootstrap procedure
  • Multiplicity of testing performing statistical
    tests on many genes in parallel
  • Bonferroni adjustment
  • Procedure in SAM -- basic idea
  • GO term enrichment basic idea

3
Machine learning and data mining
  • Unsupervised learning methods
  • Hierarchical clustering algorithms
  • K-mean
  • Principal component analysis
  • Clustering quality assessment reliability
  • Supervised classification
  • Perceptron algorithm
  • K-nearest neighbor
  • Fishers discriminant (the difference with PCA)
  • Bayesian decision rule
  • Support vector machines (the relationship with
    perceptron algorithm)
  • Feature selection
  • Classification Cross-validation
  • criteria
  • Procedure for supervised classification (learning
    and testing, evaluation criteria,
    cross-validation)
  • For the above, you should be able to explain
    principle mathematically and perform computation

4
  • Transcription bind motif detection
  • Purpose, general idea
  • Bayesian network learning
  • Purpose, general idea
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