92 DISACCHARIDES, POLYSACCHARIDES AND GLUCOSIDES 



solutions, and is precipitable from aqueous solutions by alcohol. 

 Hydrolysis by dilute hydrochloric acid yields sulphuric acid and 

 Chondroitin: 



+ H 2 Ci 8 H 27 NOi4 + H 2 SO 4 



chondroitin sulphuric acid + water = ohondroitin -f- sulphuric acid. 



Chondroitin reduces Fehling's solution. On further hydrolysis it 

 yields d-galactose and d-glucuronic acid; it appears to be a compound 

 of glucuronic acid and an amino-hexose, Chondrosamin, or amino- 

 galactose. 



REFERENCES. 

 GENERAL: 



Armstrong: Simple Carbohydrates and the Glucosides. London. 2d edition. 

 SYMBIOSIS: 



Schottelius: Arch. f. Hygiene, 1898, 34, p. 210; 1902, 42, p. 48; 1908, 67, p. 177. 



Nuttal and TUerf elder: Zeit. f. physiol. Chem., 1895, 21, p. 109; 1896, 22, p. 62. 



Armsby: U. S. Bureau of Animal Industry, Bull. 139, 1911. 



McCollum and Davis: Jour. Biol. Chem., 1915, 20, p. 641. 



Kuriyama and Mendel: Ibid., 1917, 31, p. 125. 

 AMINOPOLYSACCHARIDES AND CARBOHYDRATE ESTERS: 



Alsberg and Hedblom: Jour. Biol. Chem., 1909, 6, p. 483. 



Morgulis: Am. Jour. Physiol., 1917, 43, p. 328 (chitin). 



Mandel and Levene: Zeit. f. physiol. Chem., 1905, 45, p. 386; Biochem. Zeit., 

 1907, 4, p. 78. 



Levene and La Forge: Jour. Biol. Chem., 1913, 15, p. 155; 1914, 18, pp. 123 and 

 237; 1915, 20, p. 433. 



Levene: Ibid., 1916, 26, p. 143. 



Levene and Lopez-Sudrez: Ibid., 1916, 25, p. 511; 1916, 26, p. 373. 



Levene: Ibid., 1917, 31, p. 609. 



