limits systemic absorption from the GI tract. Unlike most chemicals, proteins are also degraded by proteases which cleave peptide bonds that hold the protein together. Independent of the differences between proteins and chemicals, the estimated exposure levels for CP4 EPSPS and Cry1Ab proteins after food processing (0.0027 and 0.0005 mg/person/day respectively) are comparable to, or below the level of no toxicological concern for most chemicals.