Figure 2

Frequency of sequence reads among the pea aphid miRNAs. Those miRNAs that are also found in other species show higher read frequencies than the pea aphid specific miRNAs. For the two batches of miRNAs (in black, miRNAs found in other species and in white miRNAs found only in A. pisum), the number of reads have been distributed between 5 classes: miRNAs represented by 1-100 reads, 101-500 reads, 501-1000 reads, 1001-10000 reads or >10000 reads. The figure shows for each batch the percentage of miRNAs in each class.