MeSH definition : A group of ribonucleotides (up to 12) in which the phosphate residues of each ribonucleotide
act as bridges in forming diester linkages between the ribose moieties.;
A group of ribonucleotides (up to 12) in which the phosphate residues of each ribonucleotide
act as bridges in forming diester linkages between the ribose moieties.