糊粉粒米、小麥、水稻等禾本科植物種子裡,糊粉粒分布在胚乳的最外一層細胞中,特稱為“糊粉層”,常因精碾而損失.Non-active but more stable crystalline or amorphous small particles, stored in the plant cytoplasm. That the activity of proteins and constitute the protoplasm of different proteins, not swell, and therefore also known as protein crystals. Mainly in plant seeds, especially those containing fat seeds. like the endosperm in the castor and tung tree cells, it contains a large aleurone grains under the microscope, can be seen one to many spherical or polygonal crystals of protein crystals. In the pea cotyledon cells and potato tuber cells, protein crystallization can be seen. while in soybean seeds can frequently be seen in the aleurone grains and starch grains mixed with the existence of the phenomenon. In addition, corn, wheat, rice and other grasses seeds, the aleurone grains distributed in the outermost layer of endosperm cells, special called "aleurone", often lost due to fine grinding.