TABLE 5.

GC-MS characterization of CB dioxygenation products formed by selected BphA variants^a

CB substrate	BphA variant	tr (min)	M (MS) of derivative, in Da	No. of chlorines	Type of compound
4,4′	MZ7	20.9	322	2	BDHD
	MZ11	20.9	322	2	BDHD
3,4,4′	MZ7	22.9	356	3	BDHD
	MZ11	22.9	356	3	BDHD
3,5,4′	MZ4	22.1	356	3	BDHD
2,6,4′	LB400	21.1	320	2	DHB
	MZ5	21.1	320	2	DHB
	MZ13	21.1	320	2	DHB

^at_r, retention time; M (MS), molecular mass determined by MS; DHB, dihydroxybiphenyl.