Xylan is a type of polysaccharide, primarily found in the cell walls of plants, particularly in hardwoods and some grasses. It is a major component of hemicellulose, which provides structural support and helps maintain the integrity of plant cells. Xylan consists of a backbone of xylose sugar units, which can be modified with various side chains. In addition to its role in plant structure, xylan has applications in various industries. It can be extracted and used in the production of biofuels, food additives, and pharmaceuticals. Researchers are also exploring its potential in biodegradable materials and as a source of dietary fiber.