Pyrroloquinoline quinone (PQQ) is redox cofactor. It is found in soil and foods such as kiwifruit, as well as human breast milk. Enzymes containing PQQ are called quinoproteins. Glucose dehydrogenase, one of the quinoproteins, is used as a glucose sensor. PQQ stimulates growth in bacteria.
--From Wikipedia
PQQ is an aromatic heterocyclic orthoquinone.
Chemical name: disodium 9-carboxy-4,5-dioxo-1H-pyrrolo[5,4-f]quinoline-2,7-dicarboxylate
Molecular formula: C14H4N2Na2O8.
Molecular weight: 374.17
CAS number :122628-50-6
Appearance:reddish powder
Assay:98.0%min
Reference price:usd2400-usd2700/kg
PQQ was originally identified as a bacterial cofactor for primary alcohol dehydrogenases (Hauge, 1964; Anthony and Zatman, 1967; Salisbury et al., 1979; Duine and Jongejan, 1989). It has been reported to be produced by Gram-negative, methanol-utilizing bacteria, such as strains of the genera Hyphomicrobium and Methylobacterium where PQQ is biosynthesized from l-tyrosine and l-glutamic acid precursors (Houck et al., 1988; van Kleef and Duine, 1988; Urakami et al., 1992).
PQQ advised dosage
Dietary supplements containing PQQ are available in the USA and Canada for use by healthy adults at a maximum intake level of 50 mg/day and 20 mg/day (Health Canada, 2016), respectively.
--From EFSA Journals
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Pyrroloquinoline quinone
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