peptidoglycan

noun

pep·​ti·​do·​gly·​can ˌpep-tə-dō-ˈglī-ˌkan How to pronounce peptidoglycan (audio)
: a polymer that is composed of polysaccharide and peptide chains and is found especially in bacterial cell walls

called also mucopeptide, murein

Examples of peptidoglycan in a Sentence

Recent Examples on the Web There's an outer membrane, which contains LPS, and an inner membrane made of peptidoglycan, a large polymer that forms a rigid mesh scaffold around the bacterial cytoplasm. Beth Mole, Ars Technica, 5 Jan. 2024 The drugs are generally active against gram-positive bacteria, a group of bacteria that has peptidoglycan on the outside of the cell wall. Jenny Sweigard, Verywell Health, 16 Nov. 2023 When most cells grow and divide, the peptidoglycan breaks apart, grows, and then reassembles itself partly from the original pieces. Jeffrey Kluger, Time, 16 June 2023 Jutras is developing a test strip embedded with monoclonal antibodies sensitive to the peptidoglycan fragments, which could be dipped into a urine sample and turn a telltale color if the bacterial material is present. Jeffrey Kluger, Time, 16 June 2023 That thick layer of peptidoglycan helps hold in a purple dye called crystal violet. Beth Mole, Ars Technica, 16 Aug. 2019 By contrast, cells with more complex cell walls consisting of a relatively thin layer of peptidoglycan plus an outer membrane don’t hold in crystal violet as well. Beth Mole, Ars Technica, 16 Aug. 2019 The authors think that the peptidoglycan remains in synovial fluid after the pathogen is gone. Linda Carroll, NBC News, 18 June 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'peptidoglycan.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1966, in the meaning defined above

Time Traveler
The first known use of peptidoglycan was in 1966

Dictionary Entries Near peptidoglycan

Cite this Entry

“Peptidoglycan.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peptidoglycan. Accessed 22 Jun. 2024.

Medical Definition

peptidoglycan

noun
pep·​ti·​do·​gly·​can ˌpep-təd-ō-ˈglī-ˌkan How to pronounce peptidoglycan (audio)
: a polymer that is composed of polysaccharide and peptide chains and is found especially in bacterial cell walls

called also mucopeptide, murein

More from Merriam-Webster on peptidoglycan

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