TABLE 2.

Electron spectroscopic characteristics of meta ring cleavage products formed from different ortho-substituted biphenyls by the combined actions of BphA and BphC

Substrate	Characteristics of products
	λmax (nm)	Amaxa
2,2′-DiF-Bb	396d	1.5d
2,2′-DiCl-Bb	392d	1.3d
2,2′-DiBr-Bb	392d	0.9d
2,2′-Di(NO2)-Bc	388e	1.3e

^aA_max, absorption at λ_max. 

^bNominal substrate concentration of 300 μM; B, biphenyl. 

^cNominal substrate concentration of 150 μM. 

^dProducts formed by BphA were incubated for 5 min with extracts of E. coli cells containing BphC2 of R. globerulus P6. 

^eProducts formed by BphA were incubated for 5 min with E. coli cells containing BphC of Burkholderia sp. strain LB400.