The snoRNA molecule contains an antisense element (a stretch of 10-20 nucleotides), which are base complementary to the sequence surrounding the base (nucleotide) targeted for modification in the pre-RNA molecule.
A molécula de snoRNA contén un elemento antisentido (un tramo de 10-20 nucleótidos) que ten complementariedade de bases coa secuencia que rodea a base (nucleótido) obxectivo da modificación na molécula do pre-ARN.