- The most abundant form of RNA. Together with proteins, it forms the ribosomes, playing a structural role and also a role in ribosomal binding of mRNA and tRNAs. Individual chains are conventionally designated by their sedimentation coefficients. In eukaryotes, four large chains exist, synthesized in the nucleolus and constituting about 50% of the ribosome. (Dorland, 28th ed)
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- A class of RNA found in the ribosomes of cells.
Definition from: Human Genome Project Information
at the U.S. Department of Energy
Related discussion in the Handbook
See also Understanding Medical Terminology.