The present invention relates to transgenic plants, such as wheat or maize, comprising plant cells having SEQ. ID. NO. 1 and seeds derived from those plants. It also relates to the use of said seed for the preparation of a flour which in turn is used for the preparation of food and/or feed such as dough, batters, pastries, cookies, pasta, wafers, bread and/or confectionery. The thus obtained gliadin-free foodstuff is beneficial for feeding patients suffering from coeliac disease and/or other forms of gluten intolerance.