In the report, the GMO Panel makes some new recommendations for assessing the allergenic potential of the proteins contained in GM plants. In particular, it describes how to analyse the sequence of the proteins in order to identify possible similarities with known allergens; how to test the potential of the proteins to bind with specific antibodies (suggesting they could trigger an allergic reaction); and how to test the breakdown of the protein during digestion.
http://www.efsa.europa.eu/EFSA/efsa_locale-1178620753812_1211903078052.htm