TABLE 1.

Catabolites formed by BphA from halogenated biphenyls and analysis of their n-butylboronates by GC-MS

Substratea	Products
	tr (min)b	Relative yieldc (%)	Prominent ionsd (m/z)	Type of compound
2,2′-DiF-B	19.5	10–15	290	2,2′-DiF-B-5,6-DHDe
			290-68
	20.7	85–90	270	2,3-Di(OH)-2′-F-B
			270-56
2,2′-DiCl-B	22.6	100	286	2,3-Di(OH)-2′-Cl-B
			286-56
2,2′-DiBr-B	23.7	100	330	2,3-Di(OH)-2′-Br-B
			330-56

^aB, biphenyl. 

^bt_r values refer to the XTI-5 column (see Materials and Methods). 

^cDeduced from total ion chromatogram peak areas. 

^dIons known to be typical for the type of compound given are underlined. 

^eTentative assignment of hydroxylated carbons.