tools for processing UMI RNA-tag data

 Umis provides tools for estimating expression in RNA-Seq data which
 performs sequencing of end tags of transcript, and incorporate molecular
 tags to correct for amplification bias.
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 There are four steps in this process.
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  1. Formatting reads
  2. Filtering noisy cellular barcodes
  3. Pseudo-mapping to cDNAs
  4. Counting molecular identifiers