<p>An evidence describes the source of an annotation, e.g. an experiment that has been published in the scientific literature, an orthologous protein, a record from another database, etc.</p>
The aleurone grain (protein body), is a specialized dry vacuole where storage proteins accumulate in a stable form in seeds, usually in the endosperm. Cells containing aleurones form the aleurone layer. These act as a source of amino acids for various synthetic activities during germination, but also represent immensely important nutritional sources for humans and ruminants. In most seeds, the aleuron grains contain three morphologically distinct regions: the matrix, crystalloid, and globoid.