Source:http://linkedlifedata.com/resource/umls/id/C1325674
GO: Plant storage body for amylose and amylopectin, 1-100um in diameter. Also contains small amounts of enzymes, amino acids, lipids and nucleic acids. The shape of the grain varies widely amongst species, but is often spherical or disk-shaped. [GOC:jl, PMID:11217978]