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Reference-base Expression analysis: the key idea

Map reads to a reference genome with aligners

  • TopHat
  • TopHat2
  • HiSat
  • HiSat2
  • STAR

→ These aligners are “splice aware”

→ They generate a BAM Alignment file

Use a read counting software and annotation information (GTF, GFF3, BED, …) to count the read spanning a gene / transcript

The input file for this counting software is the BAM Alignment file

Read counts are proxies to RNA steady state levels