Monosaccharide derivatives, Biology

MONOSACCHARIDE DERIVATIVES

They are modified monosaccharides.

GLYCOSIDES

  • They are compounds formed by condensation reaction between a sugar and hydroxyl group of another substance which may be a sugar, a sterol, glycerol, methyl alcohol, etc.
  • Streptomycin is a glycoside.
  • Other medicinally important ones are cardiac glycosides.

ALCOHOLIC SUGAR

  • When aldehyde group of monosaccharide is converted into alcohol (OH) group, then it is called alcoholic sugar.
  • Glucose → Sorbitol
  • Mannose → Mannitol
  • Reduction of aldehyde and ketone group converts a sugar into sugar alcohol.
  • Ascorbic acid or vitamin C is sugar acid.
  • Glucouronic acid and iduronic acid are components of chondroitin sulphate, cell wall and gums.

AMINO SUGARS (HEXOSAMINES)

  • When -OH group of second carbon converted into -NH then it is called amino sugar.
  • Glucose → Glucosamine
  • They are generally formed by replacement of hydroxyl group at carbon 2 with amino group (-NH ).
  • Glucosamine is the most common amino sugar that occurs in chitin, fungal wall and hyaluronic acid.
  • Galactosamine is used in synthesis of cartilage.
  • Mannosamine is found in mucoprotein.
  • Amino sugars also occur in some antibiotics.
Posted Date: 10/9/2012 3:29:21 AM | Location : United States







Related Discussions:- Monosaccharide derivatives, Assignment Help, Ask Question on Monosaccharide derivatives, Get Answer, Expert's Help, Monosaccharide derivatives Discussions

Write discussion on Monosaccharide derivatives
Your posts are moderated
Related Questions
Define Precautions for estimation of vitamin c in a solution? 1. Rinse all glassware with 3% metaphosphoric acid before you begin your practical and subsequently each time you

Bi-and Poly-Functional Enzymes These enzymes are generated by genes obtained by fusion of the coding regions of two or more genes encoding various enzymes. In simple words, the

Q. What are the venous of the valves system? What is their function? The valves of the venous system are structures inside the veins that permit blood to flow only in the norma

Similarities in body parts often indicate shared ancestry. Which of the following is true? Structures used for different purposes in different groups can be controlled by the same

Define role of Vitamin K in controlling gene expression? Prithrombin, a protein required for blood clotting is assembled with a large number of glutamic acid residues. In the p

State one benefit of including vegetable fibre (roughage) in the diet   Vegetable fibre retains water (keeping the faeces soft and bulky), stops constipation, decreases the

ORGANIZER THEORY - It was propounded by spemann (1901). He was given Nobel prize of 1935 for this wrok. He studied the embryonic development of frog, newt & other amph

Pound cake test In some cases, oil or margarine creaming volume is most accuratelymeasured by preparing a regular pound cake, omitting the chemical leavener andmeasuring the vo

What are the main proteins that constitute the sarcomere? What is the function of those molecules in the muscle cells? In the sarcomere there are organized myosin and actin blo

Q. What is the structure into which the follicle is transformed after ovulation? What is the importance of that structure in the menstrual cycle? The follicle that released the