pyridoxal
Definition
Noun: * A form of vitamin B6, specifically an aldehyde, that functions as a coenzyme in numerous metabolic processes, particularly in the metabolism of amino acids and glycogen.
Usage
- Pyridoxal is a scientific and biochemical term. It is used in contexts related to nutrition, biochemistry, medicine, and physiology.
- It is one of several naturally occurring compounds (along with pyridoxine and pyridoxamine) that exhibit vitamin B6 activity in the body.
- Its active form, pyridoxal phosphate, is the crucial coenzyme.
Examples
- The enzyme requires pyridoxal phosphate as a cofactor to catalyze the reaction.
- A deficiency in pyridoxal and other B6 vitamers can lead to neurological symptoms.
- Researchers studied the role of pyridoxal in neurotransmitter synthesis.
Advanced Usage
- Pyridoxal phosphate (PLP): This is the metabolically active, phosphorylated form of pyridoxal. It is the essential coenzyme for over 140 enzyme reactions.
- Example: "PLP is the coenzyme for aminotransferases, which are vital for amino acid metabolism."
Variants and Related Words
- Pyridoxine: Another form of vitamin B6, often found in supplements and fortified foods.
- Pyridoxamine: A third natural form of vitamin B6.
- Vitamin B6: The generic term encompassing pyridoxal, pyridoxine, and pyridoxamine.
- Coenzyme: A non-protein compound necessary for the activity of an enzyme; pyridoxal phosphate is a coenzyme.
Synonyms
- A form of vitamin B6
- A B-complex vitamin
Notes on Meaning
The core meaning of pyridoxal is specific: it refers to one precise chemical compound within the vitamin B6 group. It is not a general synonym for vitamin B6 itself, though it is a constituent of it. Its primary functional importance is as the precursor to the coenzyme pyridoxal phosphate (PLP).
Noun
-
a B vitamin that is essential for metabolism of amino acids and starch
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