N-acetyl-d-glucosamine (GlcNAc) is a monosaccharide that polymerizes linearly through (1. 4)-β-linkages. GlcNAc is the monomeric unit of the polymer chitin. GlcNAc is a basic component of hyaluronic acid and keratin sulfate found on the cell surface. https://safeersappliancers.shop/product-category/samsung-rs67n8210s9-american-style-freestanding-65-35-fridge-freezer/