Table 1.

Previously reported noncanonical site types

The residue ‘O’ indicates a Watson-Crick base pairing between miRNA and mRNA target and ‘Ø‘ represents all the other interactions other than a Watson-Crick base pairing. ‘W’ and ‘X’ indicate wobble pairing and mismatch, respectively. For the mRNA region responding to the 1st nucleotide position of miRNA, ‘A’ is assigned if adenine is in that position. A bulge on mRNA side is depicted as a protrusion of a nucleotide on the mRNA strand, and a bulge on miRNA side is represented as the residue ‘D’.