Definition

1. Noun:
   • A coenzyme: NADP is a coenzyme that functions similarly to NAD (nicotinamide adenine dinucleotide) and is found in most living cells. It serves as a reducing agent in various metabolic processes, particularly in anabolic reactions like photosynthesis and lipid synthesis.

Usage Examples

• Noun:
  • NADP is crucial for the Calvin cycle in photosynthesis.
  • The enzyme uses NADP as an electron carrier.
  • A deficiency can affect metabolic pathways that rely on NADP.

Advanced Usage

• "NADPH": This is the reduced form of NADP (nicotinamide adenine dinucleotide phosphate), carrying electrons and a hydrogen ion. It is a primary reductant in biosynthetic reactions.
  • NADPH provides the reducing power for fatty acid synthesis.

Variants and Related Words

• NAD (Nicotinamide Adenine Dinucleotide): A related coenzyme that primarily functions in catabolic reactions (e.g., cellular respiration).
• Coenzyme: A broader category of non-protein organic molecules that assist enzymes.
• Reductant: A substance that donates electrons in a chemical reaction; NADP acts as a biological reductant.

Synonyms

• Nicotinamide adenine dinucleotide phosphate: The full chemical name for NADP.
• Electron carrier: Describes its functional role in metabolism.
• Coenzyme II (obsolete): An older term for NADP.

Notes

• Biochemical Context: NADP is most commonly discussed in the contexts of biochemistry, cell biology, and plant physiology. It is not typically used in everyday language.
• Key Distinction: While structurally similar to NAD, NADP is phosphorylated and primarily involved in anabolic (building-up) processes, whereas NAD is more involved in catabolic (breaking-down) processes like glycolysis.

Noun

1. a coenzyme similar to NAD and present in most living cells but serves as a reductant in different metabolic processes