A standard set of annotation files released in PmiREN 1) *_basicInfo.txt Primary file of PmiREN database which contains miRNA coordinates, sequences, secondary structures, confidence level, links of other databases, etc. 2) *_clusterInfo.txt Tab-delimited list of miRNA cluster information 3) *_hairpin.fa Nucleotide FASTA format file of all hairpin miRNA sequences (pre-miRNA with extended 20bp at both ends) 4) *_mature.fa Nucleotide FASTA format file of all mature miRNA sequences 5) *_mature.lib.exp.txt Tab-delimited list of all mature miRNA expression (RPM value) in different sRNA-Seq libraries 6) *_mature.tissue.exp.txt Tab-delimited list of all mature miRNA expression (RPM value) in different tissues (values from different libraries but the same tissue are combined,the means are represented) 7) *_star.lib.exp.txt Tab-delimited list of all star miRNA expression (RPM value) in different sRNA-Seq libraries 8) *_star.tissue.exp.txt Tab-delimited list of all star miRNA expression (RPM value) in different tissues (values from different libraries but the same tissue are combined,the means are represented) 9) *_targetGene.txt Tab-delimited list of miRNA target genes and scores using psRNATarget, RNAhybrid, CleaveLand4