Nucleotide occupancy position in human mature miRNAs.

A Web logo with the distinct nucleotides at all positions of the mature miRNA sequences. B. Nucleotides representation at the first position of miRNAs mature strand at 5’ and 3’ end, in context to their length. The number under the name of nucleotide (e.g. 108 for A) reflects 108 sequences with A as a first nucleoside at 5’ end, and 27 at 3’, respectively.