Fig 6. Gene organization of those genes encoding the pyomelanin synthesis pathway in Aeromonas strains.

Genes are represented by arrows as follows: phhA, gene encoding the phenylalanine hydroxylase; phhB, gene encoding the 4a-carbinolamine dehydratase; tyrB, gene encoding the aromatic amino acid aminotransferase; aspC, gene encoding the aromatic amino acid aminotransferase; hppD, gene encoding the 4-hydroxyphenylpyruvate dioxygenase. The numbers beneath the arrows indicate the levels of amino acid sequence identity (expressed as percentages) between the encoded gene products and the equivalent products from A. media strain WS.