Abstract
Chondroitinsulphuric acid-protein-complexes are isolated chromatographically from water insoluble residues of human normal and sclerotic aortas. The complexes decomposed by papain have a characteristic identical amino-acid spectrum. Chondroitinsulphuric acids yield aside from galacto-samine D-talosamine in an acid hydrolysis. The origin of the latter is discussed.