Number of optical isomers possible for Glucose is
Leber van Hoft rule for the number of stereoisomers is 2n where 'n' is the number of chiral centers. In open chain of glucose, there are 4 chiral centers. Hence it is 24 =16 isomers.Glucose, with four asymmetric carbon atoms, can form 16 isomers.Sugars have large numbers of stereoisomers because they contain several asymmetric carbon atoms.Ref: Harper&;s Biochemistry; 30th edition; Chapter 15; Carbohydrates of Physiological Significance
2
4
8
16
Structure and function of protein