Definition of pyridoxal in English:


Syllabification: pyr·i·dox·al
Pronunciation: /ˌpiriˈdäksəl


  • An oxidized derivative of pyridoxine that acts as a coenzyme in transamination and other processes.
    More example sentences
    • This conversion is catalyzed by the ATP requiring enzyme, pyridoxal kinase.
    • B6 vitamers are first oxidized to pyridoxal, and rapidly phosphorylated to P5P in the liver.
    • The central domain is typical of class 1 pyridoxal - 5'-phosphate-dependent enzymes.


1940s: from pyridoxine + -al.

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