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[mass noun] An oxidized derivative of pyridoxine which acts as a coenzyme in transamination and other processes.
- ‘The central domain is typical of class 1 pyridoxal - 5'-phosphate-dependent enzymes.’
- ‘The deuteration effects arose from the reversible deprotonation of the Schiff base formed between glutamate and pyridoxal phosphate.’
- ‘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.’
1940s: from pyridoxine + -al.
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