passages.id: split_6_test_1168_passage
passages.type: progene_text
passages.text: The genetic organization of the phd genes , the phylogenetically diverged positions of these genes , and an unusual type of ferredoxin component suggest phenanthrene dioxygenase in Nocardioides sp. strain KP7 to be a new class of aromatic ring - hydroxylating dioxygenases .