nu·cle·in /ˈnukliən, ˈnju-/
  nu·cle·in /ˈn(j)uklɪən/ 名詞
  核質(核蛋白)
  Nu·cle·in n. Physiol. Chem. A constituent of the nuclei of all cells, containing protein and nucleic acid.  It is a colorless amorphous substance, readily soluble in alkaline fluids and especially characterized by its comparatively large content of phosphorus.  It also contains nitrogen and sulphur.
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