MeSH definition : A group of 13 or more ribonucleotides in which the phosphate residues of each ribonucleotide
act as bridges in forming diester linkages between the ribose moieties.;
A group of 13 or more ribonucleotides in which the phosphate residues of each ribonucleotide
act as bridges in forming diester linkages between the ribose moieties.