TABLE 3.

CBAs formed from CBs by BphA-B4h or BphA-LB400 and BphBCD-LB400

Substrate	BphA	Result for CBA
		Retention time (min)	λmax (nm)	Identification	Concn (μM)
2,2′-CB	B4h	3.40 ± 0.01	204 ± 2	2-CBA	44.8 ± 15.4
	LB400	3.38 ± 0.01	204 ± 2	2-CBA	121.0 ± 13.0
3,3′-CB	B4h	5.80 ± 0.05	231 ± 2	3-CBA	25.4 ± 4.6
	LB400	5.75 ± 0.04	231 ± 2	3-CBA	9.9 ± 2.7
4,4′-CB	B4h	NOa	NO	NO	NO
	LB400	NO	NO	NO	NO
2,6-CB	B4h	2.98 ± 0.05	206 ± 5	2,6-CBAb	2.9 ± 1.4
	LB400	NO	NO	NO	NO
2,6,4′-CB	Bh4	NO	NO	NO	NO
	LB400	5.58 ± 0.04	240 ± 2	4-CBA	0.5 ± 0.3
2,5,4′-CB	B4h	5.84 ± 0.05	200 ± 5	2,5-CBAb	0.5 ± 0.3
	LB400	NO	NO	NO	NO

^aNO, not observed.

^bIdentification based mainly on the retention time due to the uncharacteristic spectrum of the respective CBA.