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A Review of the Environmental Safety of the Cry1Ab Protein

Agriculture & Food Systems Institute
July 24, 2026

This document provides an updated comprehensive review of information and data relevant to the environmental risk assessment of Cry1Ab, a protein encoded by genes isolated from Bacillus thuringiensis (Bt), and presents a summary statement about the environmental safety of this protein when produced in genetically engineered (GE) crops. The original version of this review was published in 2011 (AFSI, 2011). All sources of information reviewed herein are publicly available and include dossiers presented to regulatory authorities, decision documents prepared by regulatory authorities, product descriptions prepared by product developers, and peer reviewed literature.