Table 1.

Purification scheme for HQDO from Sphingomonas sp. strain TTNP3

Purification step	Activity (U)	Protein (mg)	Spec. act. (U mg-1)	Purification factor	Yield (%)
Cell extract	35.7	245	0.15	1	100
Ammonium sulfate fractionation	35.9	108	0.33	2.3	101
Phenyl-Sepharose	34.5	19.2	1.80	12.4	89
DEAE	14.8	3.3	4.42	30.4	44
MonoQ	9.5	1.6	6.06	41.6	30