2 . Cellulose , ( C6H10O5 ) n
It is the most abundant and structural , polysaccharide of plants . It is important food source of some animals It is a polymer of D (+) β-glucose .
The chief sources of cellulose are wood ( Contains 50 % cellulose rest being lignin , resins , etc ) and cotton ( contains 90 % cellulose rest being fats and waxes ).
Several materials are obtained from cellulose :
1 . Mercerised cotton Cellulose treated with cone . sodium hydroxide solution acquire silky lustre . It is called mercerissd cotton .
2 . Gun cotton It is completely nitrated cellulose ( cellulose nitrate ), highly explosive in nature and is used in the manufacture of smokeless gun powder , called blasting gelatin .
3 . Cellulose acetate It is used for making acetate rayon and motion picture films .
4 . Cellulosexanthate It is obtained by treating cellulose with sodium hydroxide and carbon disulphide and is the basic material for VISCOSE rayon .
Oligosaccharides and heteropolysaccharides are also called heteropolysaccharides .