Another major worry is that Bt- corn may be potentially harmful to human beings. This concern has caused many companies to stop using the genetically altered corn in their products. In reality, the Cry1Ab gene does not cause any adverse side effects in humans. The Cry1Ab gene has been proven to be safe for human consumption. They include promoters, terminators, and enhancers.
Promoters are bits of DNA that regulate where, when, and to what degree a trait is expressed.
Terminators tell where the end of the DNA sequence for the gene is. Enhancers are DNA sequences that increase the rate in which the gene is transcribed into the Cry1Ab protein. In other words, the gene and any other DNA inserted into the corn do not cause any harm by consumption. Even though the EPA has cleared the Cry1Ab protein from any side effects, there have been allergic reactions reported. However, these reactions were determined not to be due to Bacillus thuringiensis itself or any of the Cry toxins.