Additional file 9.

Strand bias ofcis-NATs that gave rise to nat-siRNAs. The strand bias is computed among different types of cis-NAT pairs under four different conditions. A total of nine types are listed. Here, plus indicates that the orientation of transcripts are the same as the reference genome, minus indicates opposite orientation of transcripts. One strand means only one strand of the cis-NATs gave rise to small RNAs. The plus/minus or minus/plus means one strand of the cis-NATs spawns at least five (part A) or two (part B) fold more small RNAs than the other.

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Lu et al. BMC Genomics 2012 13:721   doi:10.1186/1471-2164-13-721