This data archive contains the miRNA expression data for cancer samples
of The Cancer Genome Atlas (TCGA) project. The experiments were
performed by the BCCA Genome Sciences Centre in BC using the miRNA-Seq approach
on the Illumina platform.

Please see DESCRIPTION.txt in the mage-tab for algorithm description of the data protocols.

The .adf file format describing miRNA annotations is as follows:

MiRNA ID
miRBase version
genome version and coordinates as <version>:<Chromosome>:<Start position>-<End position>:<Strand>
precursor sequence
mature strand coordinates relative to precursor coordinates, as <relative start>-<relative end>
mature strand accession
alternate mature strand coordinates, if provided by miRBase
alternate mature form accession
star strand name, if provided by miRBase
star strand form accession

The .mirna.quantification.txt  data file describing summed expression for each miRNA is as follows:

miRNA name
raw read count
reads per million miRNA reads
cross-mapped to other miRNA forms (Y or N)

The .isoform.quantification.txt data file describing every individual sequence isoform observed is as follows:

miRNA name
alignment coordinates as <version>:<Chromosome>:<Start position>-<End position>:<Strand>
raw read count
reads per million miRNA reads
cross-mapped to other miRNA forms (Y or N)
region within miRNA
