Figure 3

Time course of production of toluene and toluene-d_5, and decay of phenylalanine and phenyl-d₅-alanine in (A) anoxic-1 incubations (with excess nitrate), (B) anoxic-2 incubations (with excess sulfate), (C) anoxic-3 incubations (without electron acceptor added), and (D) oxic incubations.