Column names are defined by:
1. Chromosome
2. PA site start
3. PA site end
4. PA site identifier: The hugo name of the corresponding gene and the number of the PA site (the site at the outermost 3' end corresponds to 1)
5. The number of supporting MACE reads
6. The mapping strand
7. The region in the gene (3'UTR, exon, intron...)
8. The median in the cluster
9. The mode in the cluster
10. The lost miRNA binding sites if the PA site ist used (if there are any)