ubiquitin: Meaning and Definition of

u•biq•ui•tin

Pronunciation: (y-bik'wi-tin), [key]
  1. a small protein, present in all eukaryotic cells, that participates in the destruction of defective proteins and in the synthesis of new proteins.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.