Definition of "threonine" [threonine]

• A colorless crystalline amino acid, C4H9NO3, that is obtained from the hydrolysis of protein and is an essential component of human nutrition. (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.

• "The STK11 gene has the ability to produce an enzyme called "serine/threonine kinase 11" that has several important functions:"
• "ALG fractions were identified as a sugar protein complex and the protein moiety of ALG contained high amounts of glutamic acid (or glutamine), threonine, asparagic acid (or asparagine) and proline."
• "They're currently working on methionine and threonine."