galactosaminogalactan
galactosaminogalactan
An exopolysaccharide composed of α1→4 linked galactose and α1→4 linked <em>N</em>-acetylgalactosamine (GalNAc) residues where both monosacharides are randomly distributed. It is secreted by the opportunistic fungal pathogens, <em>Aspergillus fumigatus</em> and <em>Aspergillus niger</em>.