Unfortunately the dogmatic superstitious believers form cults that regulate crops and spread the crops worldwide. The gene sequence specifies a string of amino acids in the protein that will take on a shape that activates the allergic response. The problem is that only a few such epitope maps have been constructed. Nevertheless, it has grown popular to take those few data to judge the gene sequences that will cause an allergic response. Some but not all allergens are inactivated by heating.
Most allergens resist stomach acids and digestive enzymes.
New proteins expressed in non edible plant parts are not of concern in food allergy. Testing for allergenicity requires experiments on humans. A relatively large group must be employed because the factors causing allergy are not well defined. Limited release of genetically engineered foods would be desirable, but has been rejected those promoting the technology. The sera of allergic people can be used to test for reactions in extracts of a crop.