
Proteinoplasts (sometimes called proteoplasts, aleuroplasts, and aleuronaplasts) are specialized organelles found only in plant cells. They contain crystalline bodies of protein and can be the sites of enzyme activity involving those proteins. Proteinoplasts are found in many seeds, such as brazil nuts and peanuts. Although all plastids contain hi...
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http://en.wikipedia.org/wiki/Proteinoplast

Form of plastid adapted as a protein storage organelle, the protein may be crystalline. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

(= proteoplast) Form of plastid adapted as a protein storage organelle; the protein may be crystalline.
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