a small protein, present in all eukaryotic cells, that participates in the destruction of defective proteins and in the synthesis of new proteins.
Origin of ubiquitin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
biochem a small polypeptide, found in most eukaryotic cells, that combines with other proteins to make them susceptible to degradation
Word Origin for ubiquitin
C20: from ubiquitous + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
A polypeptide found in all eukaryotic cells, including plant cells, that participates in a variety of cellular functions including protein degradation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.