ethioninen.
/iːˈθʌɪəniːn/, /iːˈθʌɪənɪn/, U.S. /iˈθaɪəˌnin/, /iˈθaɪənən/ Chemistry.
A toxic amino acid, not present in proteins, that is the ethyl homologue of methionine and acts as a growth inhibitor.Systematic name: 2-amino-4-(ethylthio)butanoic acid; C2H5S·CH2CH2CH(NH2)·COOH.
ΚΠ
1938 H. M. Dyer in Jrnl. Biol. Chem. 124 519 We have for convenience called the S-ethylhomocysteine ethionine.
1966 New Scientist 17 Mar. 708/3 A medium containing puromycin or ethionine, both of which cause almost complete inhibition of protein synthesis in these cells.
2000 Sunday Times (Perth, Austral.) (Nexis) 23 Jan. They also recommend fasting..to counter the effects of toxic substances introduced into the body through ethionine and other end-products of fermented meats.
This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022).
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n.1938