Definition of "arabinose" []

• A crystalline pentose sugar, C5H10O5, obtained from plant polysaccharides such as gums and hemicelluloses. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If the mixture contains arabinose and the indicator dye, the difference between Ara+ and Ara− is revealed, as if by heating invisible ink: they show up as white and red colonies, respectively."
• "On the first pulse of arabinose, the E. coli creates a protein called T7 RNAP."
• "In the counting project, which was published in the journal Science in May, Dr. Collins and his colleagues programmed bacteria to emit a fluorescent protein after being exposed three times to a sugar called arabinose."