Proposed pathway for the degradation of ethylbenzene in the sulfate-reducing strain EbS7. A, ethylbenzene; B, (1-phenylethyl)-succinate; C, (1-phenylethyl)succinyl-CoA; D, (2-phenylpropyl)malonyl-CoA; E, 4-phenylpentanoyl-CoA; F, 3-oxo-4-phenyl-pentanoyl-CoA; G, 2-phenylpropionyl-CoA.