Dictionary.com
Thesaurus.com

proline

American  
[proh-leen, -lin] / ˈproʊ lin, -lɪn /

noun

Biochemistry.
  1. an alcohol-soluble amino acid, C 4 H 9 NHCOOH, occurring in high concentration in collagen. Pro; P


proline British  
/ ˈprəʊliːn, -lɪn /

noun

  1. a nonessential amino acid that occurs in protein

"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

proline Scientific  
/ prōlēn′ /
  1. A nonessential amino acid. Chemical formula: C 5 H 9 NO 2 .

  2. See more at amino acid


Etymology

Origin of proline

First recorded in 1900–05; alteration of pyrrolidine

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

As proline and collagen are widely available and don't rely on chains of hydrocarbons like previous methods, the team hope to sustainably scale up their current production in the lab.

From Science Daily • May 29, 2024

I have been taking niacin for years along with vitamin C and the amino acids lysine and proline.

From Seattle Times • Jun. 14, 2023

For example, CCU, CCC, CCA, and CCG are all codons for proline.

From Textbooks • Jun. 9, 2022

All they had to do was change two of more than 1,000 building blocks in the protein into a compound called proline.

From New York Times • Apr. 5, 2021

Nothing is known, however, of the process by which the more complicated closed-ring amino-acid compounds, such as proline, histidine, or tryptophane, are synthetized.

From The Chemistry of Plant Life by Thatcher, Roscoe Wilfred