The length of phasiRNA in each phasiRNA cluster. Current studies show that 21nt phasiRNAs cleave target genes and regulate gene expression at the post transcriptional level. 24nt phasiRNAs perform DNA methylation at the transcriptional level.

Minimum number of phasiRNAs in each phasiRNA cluster.

Offset from phased postion, 0 or 1 only.
Phased positons are ranked on both strand in a phasing manner (every 21 or 24nt).

The reliability of predicted phasiRNAs. It calculated by improved hypergeometric distribution model.

Read count (expression) cutoff for user-submitted small RNA sequences.
1) Customized: small RNA reads are removed if less than a given number (0 means keep all the reads).
2) The lowest count of mapped reads: small RNA reads are removed if less than the lowest count of unmapped reads.
3) Median count of unmapped reads: small RNA reads are removed if less than the median count of unmapped reads.
4) Median count of mapped reads: small RNA reads are removed if less than the median count of mapped reads.
5) More than 1 after normalization (CPM): small RNA reads are removed if less than the 1 after count per million normalization

Please input a value (cutoff) to filter the user-submitted small RNA sequences with low read count if "Customoized" is selected.
Default value is 0, it means do not filter any sequences.

This option will normalize user-submitted small RNA samples with differnt sequencing depth, including 0 (without normalization)/ Counts per million / Counts per 10 million.

Mismatches allowed for mapping small RNA sequences to either genomic or transcript datasets.

Remove multiple mapping that higher than this value.