https://www.selleckchem.com/pr....oducts/a-1331852.htm
Plant microRNAs (miRNAs) are predominantly 21 nucleotides (nt) long but non-canonical lengths of 22 and 20 nt are commonly observed in diverse plant species. While miRNAs longer than 21 nt can be attributed to the neglect of unpaired bases within asymmetric bulges by the ruler function of dicer-like 1 (DCL1), how 20-nt miRNA is generated remains obscure. Analysis of small RNA data revealed that 20-nt miRNA can be divided into 3 main groups featured by atypical 3' overhangs or shorter duplex regions. Asymmetric bulges or mismatches at
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