Showing posts with label proteins. Show all posts
Showing posts with label proteins. Show all posts

Cotton

Cotton consists of practically pure cellulose and may be chemically described as poly (1, 4-B-D- anhydroglucopyranose).
The helical reversal structure of natural cellulose shows the constantly recurring cellobiose unit, consisting of two glucose units each with six carbon atoms. The length of unit cell along the fibre axis is 10.4A calculated for the cellobiose unit. In natural cellulosic fibres there are 3000 - 5000 C6 or glucose units joined together. This corresponds to a molecular weight of the order of 300,000 -500,000.



Proteins
Nitrogenous compounds:
  •  Present in primary cell wall and lumen.
  •  Yellow colour of cotton is due to presence of proteins and some colouring matter.
Some amino acids: