biochemistry

1. Cellulose
Biochemistry
Geane Souza
Rubem S. Bezerra

2. Presentation
● Fibrous
● Resistant
● Insoluble

3. Found
● In the cell wall of plants
● trunks
● stems

4. Type of polysaccharide
It is a Homopolymer of Glucose
It is a Carbohydrate composed of Carbon(49,39%), Oxygen(44,4%) and Hydrogen(6,17%).
The molecular formula is (C6H10O5)n
Unbranched chained polymer of glucose
Cellulose Microfibrils in plants apperar to be 4-10nm wide under the electron microspe
(Emons 1988, McCann et al 1990)

6. Biossíntese de Celulose
Formation of Cellulose from Glucose
Cellulose synthase enzyme
1,4 D Glyconpyranosic bond
B,1-4, D-Anhydroglucopyranose units linked by (1,4)-glycosidic bonds

7. Conformação
Chair
Rotation 180º

8. Por que não usamos como
fonte de combustível ?
Falta de celulase para hidrolisar a ligações (beta 1-4)

9. Propriedades
Função estrutural
Rígida
Força nas paredes celulares

10. Hydrogen Bonds
1 - Intra H bond Intra: Within a cellulose chain
2 - Inter H bond Inter: Between two cellulose chain

11. Crystalline and Amorphous region
Hydrogen bonding within and
between cellulose molecules
Amorphous region | Crystalline region | Amorphous region
Celullose
microfibrils
Crystalline region: Intra and Inter molecular bonding is so strong do not absorb much moisture.
Amorphous region: Bonding is week Abdorb too much moisture.

12. Mechanism

13. Thanks!