Frequency distribution (density and cumulative) of precursor length. Two of the possible thresholds which cover 96% and 98% of the real precursors have been indicated by down-arrows (↓). At these lengths, a reasonable sample size of miRNAs were available for estimation of parameters.
Thakur et al. BMC Genomics 2011 12:108 doi:10.1186/1471-2164-12-108