metaproteinn.
/ˌmɛtəˈprəʊtiːn/, U.S. /ˌmɛdəˈproʊˌtin/ Biochemistry. Now historical.
A protein denatured by acid or alkaline hydrolysis that is soluble in acids or alkalis but insoluble in water.
ΚΠ
1908 Jrnl. Biol. Chem. 4 p. l Metaproteins.—Products of the further action of acids and alkalies whereby the molecule is so far altered as to form products soluble in very weak acids and alkalies but insoluble in neutral fluids.
1911 Encycl. Brit. XIX. 922/1 The first result of the action of this secretion on protein matter is to render it soluble—a metaprotein or acid albumin (syntonin) being formed.
1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xliii. 644 Meta-proteins.—This includes the substances previously known as alkali-albumins and acid-albumins.
1949 G. B. Bachman Org. Chem. xviii. 220 Primary derivatives: proteins, metaproteins, and coagulated proteins.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1908