Polysialic acid
= Polysialic acid
{wiki=Polysialic_acid}
Polysialic acid is a member of the glycan family, specifically a polymer composed of sialic acid residues linked together. Sialic acids are a group of acidic sugars typically found at the ends of glycan chains on glycoproteins and glycolipids. Polysialic acid is particularly notable for its role in the nervous system and immune response.