"28S" redirects here. For the isotope of sulfur (28S), see Sulfur-28.
RNA component of the large subunit of the eukaryotic ribosome
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28S ribosomal RNA is the structural ribosomal RNA (rRNA) for the large subunit (LSU) of eukaryotic cytoplasmic ribosomes, and thus one of the basic components of all eukaryotic cells. It has a size of 25S in plants and 28S in mammals, hence the alias of 25S–28S rRNA.[1]