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Fig. 1. Proposed metabolic pathway(s) responsible for the rapid dissipation of atrazine in Colorado (CO) and Mississippi (MS) atrazine-adapted soil. Abbreviations denote genes coding for the following enzymes: atzA, atrazine chlorohydrolase; trzN, s-triazine hydrolase; atzB, hydroxyatrazine ethylaminohydrolase; atzC, N-isopropylammelide isopropylaminohydrolase; TrzD, cyanuric acid amidohydrolase; atzD, cyanuric acid hydrolase; atzE, biuret hydrolase; atzF, allophanate hydrolase; and trzF, allophanate hydrolase (Boundy-Mills et al., 1997; Cheng et al., 2005; de Souza et al., 1998; Fruchey et al., 2003; Martinez et al., 2001; Mulbry et al., 2002; Sadowsky et al., 1998; Seffernick et al., 2002; Shapir et al., 2002; Shapir et al., 2005; Shapir et al., 2006; Smith et al., 2005; Topp, 2001; Wackett et al., 2002).
