A report on Cofactor (biochemistry) and Vitamin B6

The succinate dehydrogenase complex showing several cofactors, including flavin, iron–sulfur centers, and heme.
Pyridoxal 5'-phosphate, the metabolically active form of vitamin B6
A simple [Fe2S2] cluster containing two iron atoms and two sulfur atoms, coordinated by four protein cysteine residues.
Pyridoxine (PN)
The redox reactions of nicotinamide adenine dinucleotide.
Pyridoxamine (PM)
Pyridoxal (PL)
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Its active form, pyridoxal 5′-phosphate, serves as a coenzyme in more than 140 enzyme reactions in amino acid, glucose, and lipid metabolism.

- Vitamin B6

Vitamins can serve as precursors to many organic cofactors (e.g., vitamins B1, B2, B6, B12, niacin, folic acid) or as coenzymes themselves (e.g., vitamin C).

- Cofactor (biochemistry)
The succinate dehydrogenase complex showing several cofactors, including flavin, iron–sulfur centers, and heme.

2 related topics with Alpha

Overall
Chemical structure

Riboflavin

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Vitamin found in food and sold as a dietary supplement.

Vitamin found in food and sold as a dietary supplement.

Chemical structure
Cultures of Micrococcus luteus growing on pyridine (left) and succinic acid (right). The pyridine culture has turned yellow from the accumulation of riboflavin.

It is essential to the formation of two major coenzymes, flavin mononucleotide and flavin adenine dinucleotide.

The coenzymes are also required for the metabolism of niacin, vitamin B6, and folate.

A man with pellagra, which is caused by a chronic lack of vitamin B3 in the diet

Niacin

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Organic compound and a form of vitamin B3, an essential human nutrient.

Organic compound and a form of vitamin B3, an essential human nutrient.

A man with pellagra, which is caused by a chronic lack of vitamin B3 in the diet
Niacin, serotonin (5-hydroxytryptamine), and melatonin biosynthesis from tryptophan
Inositol hexanicotinate
Space-filling model of niacin

Niacin and nicotinamide are both converted into the coenzyme NAD.

Riboflavin, vitamin B6 and iron are required for the process.