Introduced proteins are generally present at low levels in the grain/seed of biotechnology-derived crops commercialized to date (Table 11.3). One could assume that the presence in food of low levels of introduced proteins poses minimal risks and should not require comprehensive safety assessment. There is a regulatory mandate in most
* Human dietary exposures are estimated using the corn endosperm fraction. This fraction contains most of the protein which would include the introduced protein. Other corn fractions such as bran, sweeteners, and oil contain very little protein. It also assumes that the Cry1Ab protein has not been introduced into sweet corn. Data derived from the DEEM-UK database (Exponent, Inc.).
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