Abstract
1) Karl Meyer's hyaluronosulfuric acid of cornea and his mucoitin-sulfuric acid of “gastric mucin” were prepared and purified.
2) Analysis of the former itinsulfuric acid confirmed the result of the author regarding the composition, and moreover the figures obtained by the indole- and orcinol-method pointed to glucuronic acid as the uronic acid component in this polysaccharide.
3) The latter itinsulfuric acid was suspected not to contain glucuronic acid on rough identification by the analytical way, which rather suggested galacturonic acid. This polysaccharide and its basic disaccharide desaminized were then investigated by chromatography, and the presence of galacturonic acid in them was established.
4) It was proposed to call the stomach itinsulfuric acid “gastroit-insulfuric acid” and to call the cornea substance mucoitinsulfuric acid.
The expenses of this work were defrayed by a grant which was given from the Education Department through the Grant. Committee of the Science Council. H. Masamune.
