TABLE 1.

PCB degradative potency of BphA variants

BPDO	% Depletiona
	2,6-CB	3,3′CB	4,4′CB	2,3′,4-CB	2,3,4′CB	2,4,4′CB	2,2′,5,5′CB	2,2′,3,3′CB
LB400	<10	<10	<10	<10	<10	-	94	76
B-356	<10	35	<10	96	63	-	-	-
II-4	-	-	-	-	-	-	84	47
II-10	<10	<10	<10	<10	<10	-	56	24
III-17	-	-	-	73	60	-	20	27
III-34	<10	<10	<10	79	88	<10	63	23
II-9	58	45	53	99	98	44	93	87
III-37	36	58	43	96	98	29	85	65
III-52	57	51	52	97	99	50	92	83

^aThat is, the percent depletion of each PCB congener of a mix of eight added to a culture of E. coli DH11S/pQE51[LB400-bphFGB]/pDB31[bphAE] expressing either of the BphA variants. The protocol is described in Materials and Methods. The values are averages of results from three separate experiments done in triplicate. The variance was <10% of the measured value in all cases. -, no degradation; the level of depletion of <10% was not statistically significant compared to the negative control and not reported precisely.