The Pharmaceutical Journal
Vol 270 No 7246 p566
26 April 2003

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A new vitamin B?

Researchers from Japan have discovered a pyrroloquinoline quinone (PQQ) dependent enzyme that enables mice to break down the amino acid lysine. They say that PPQ should be classified as a new vitamin because of its key role in this biochemical pathway.

PQQ is found in various foods, including vegetables and meat (Nature 2003;422:832).