Vitamins

On Feb 21, 2017

Vitamins

Definition of Vitamins:

Vitamins are defined as organic compounds required in minute amounts for catalytic and regulatory functions in cell metabolism in absence of which certain deficiency diseases occur.

Classification of Vitamins:

1) Fat soluble Vitamin A, D, E, K
2) Water Soluble Vitamin B complex and Vitamin C

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Role as Co-enzymes in Different Biochemical Reactions:

1) Oxidation Reduction
2) Transfer of Group
3) Crboxylation
4) Transamination
5) Decarboxylation

Table: Co-enzyme Derivatives of Water soluble Vitamins and their Function

Sr. No.	Vitamin	Coenzyme Derivatives	Functions Performed
1	Vit B1Thiamin	TPP	Aldehyde group transfer
2	Vit B2 Riboflavin	FMN, FAD	Hydrogen group transfer, Electron transfer in Redox Reaction
3	Vit B3 Pantothenic acid	CoA	Acyl group transfer
4	Vit B5 Niacin	NAD, NADP	Hydrogen group transfer
5	Vit B6 Pyridoxine	PP	Amino group transfer
6	Vit B7 Biotin	Biocytin	Carboxyl group transfer i.e. CO2 fixing
7	I Vit B9 Folic acid	THFA	One carbon group transfer
8	Vit. B12 Cynocobalamin	Deoxyadenosyl cobalamin	Cofactor in hydroxylations

Vitamins