Crystal structure of PqqB from <i>Pseudomonas putida</i>at 2.2 &#197

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Pyrroloquinoline quinone (PQQ) is an important redox-active cofactor for many bacterial dehy-drogenases. It's biosynthetic pathway involves six or seven genes, one of which is pqqB. Former studies indicated that the protein encoded by pqqB, namely Pqq
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