Page 68 - Medicinal Plants 06-PG-101_First year_PharmD clinical

one enzymatic reaction and may act as a coenzyme in another enzyme
reaction where the two-carbon-atoms group is used.

Table 1: Some enzymes important in metabolism

Coenzyme Abbreviation Vitamin Reaction in coenzyme
NAD associated with function
* Nicotinamide NADP
adenine dinucleotide activity Transfer of hydrogen
* Nicotinamide acetyl CoA Nicotinamide (electrons)
adenine dinucleotide Transfer of hydrogen
phosphate Nicotinamide (electrons)
* Coenzyme A
Pantothenic acid Transfer of (2 carbon
atoms) acetyl group

1- Nicotinamide adenine dinucleotide NAD

(reduced form)

(reduced form)

Nicotinamide adenine dinucleotide NAD and Nicotinamide adenine
dinucleotide phosphate NADP contain two basic units each and are termed
dinucleotides. The electrons formed on the outer membrane of the
mitochondrion are carried across to inner membrane by a coenzyme
NADP. They play a key role in energy metabolism by accepting and
donating electrons.

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