Table 2.

Degradation of nitroaromatic and nitramine explosive compounds by xenobiotic reductase XenB under aerobic and anaerobic conditions

Compound	Abbreviation	Initial concentration (μM)		Relative activity (%)
		Aerobic	Anaerobic	Aerobic	Anaerobic
Nitroaromatics
2,4,6-Trinitrotoluene	TNT	36	37	100	385
2-Nitrotoluene	2-NT	9	8	0	0
3-Nitrotoluene	3-NT	10	9	0	0
4-Nitrotoluene	4-NT	8	8	0	0
2,4-Dinitrotoluene	2,4-DNT	60	57	3.7	15
2,6-Dinitrotoluene	2,6-DNT	25	27	0.2	4.4
2-Amino-4,6-dinitrotoluene	2A-4,6-DNT	96	94	0	24
4-Amino-2,6-dinitrotoluene	4A-2,6-DNT	162	165	24	36
Nitrobenzene	NB	83	80	0	0.2
1,3-Dinitrobenzene	1,3-DNB	49	48	17	24
1,3,5-Trinitrobenzene	TNB	50	50	426	2243
N-methyl-N,2,4,6-tetranitroaniline	tetryl	5	13	1454	1520
Nitramines
Hexahydro-1,3,5-trinitro-1,3,5-triazine	RDX	47	47	1.5	21
Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine	HMX	22	21	0	1.6
Hexahydro-1,3,5-trinitroso-1,3,5-triazine	TNX	49	50	0.4	6.6
Hexahydro-1,3-dinitroso-5-nitro-1,3,5-triazine	DNX	41	41	0	3.7
Hexahydro-1-nitroso-3,5-dinitro-1,3,5-triazine	MNX	29	27	0.1	2.1

Rates are presented relative to the rate obtained for TNT under aerobic conditions (0.155 μmol TNT degraded/mg XenB protein/min)