. 2014 May 19;15(1):384. doi: 10.1186/1471-2164-15-384

Table 4.

Number of ORFs coding for potential upper (ring activation) and lower (ring cleavage) pathway enzymes in strains PP1Y and F199

	*Novosphingobium* sp. PP1Y	*Novosphingobium aromaticivorans* F199
Ring hydroxylating dioxygenases	38^a	27
Membrane-bound monooxygenases	2	1
Molybdopteryn-dependent monooxygenases	5	3
Flavine monooxygenases	19	n.d.
2-oxoglutarate-dependent oxygenases (taurine-dioxygenase like)	1	0
2-oxoglutarate-dependent oxygenases	2	1
Extradiol ring-cleavage dioxygenases	10^a	6
Protocatechuate 4,5 dioxygenases (estradiol ring-cleavage)	4	3

n.d., not determined.

^aFour ORFs coding for ring hydroxylating dioxygenases and 3 ORFs coding for extradiol ring-cleavage dioxygenases are duplicated, therefore, the genome of PP1Y codes for 34 potential ring hydroxylating dioxygenases and 7 potential extradiol ring-cleavage dioxygenases.