Expression tracks expression values
Expression Tracks can be created using the RNA-Seq Analysis tool with a choice of possible expression values:
- RPKM This is the expression value measured in RPKM [Mortazavi et al., 2008]:
RPKM
.
- TPM (Transcripts Per Million) This is computed as
, where the sum is over the RPKM values of all genes/transcripts (see http://bioinformatics.oxfordjournals.org/content/26/4/493.long)
- Total counts This is all the reads that are mapped to this gene - both reads that map uniquely to the gene or its transcripts and reads that matched to more positions in the reference which were assigned to this gene.
- Unique counts This is the number of reads that match uniquely to the gene or its transcripts.