The invention relates to the preparation of DNA sequences of group 4 major allergens from cereals. The invention also includes fragments, novel combinations of partial sequences and point mutations with hypoallergenic effects. The recombinant DNA molecules and the derived polypeptides, fragments, novel combinations of partial sequences and variants can be used for therapy of pollen-allergy diseases. The proteins produced by recombination can be applied to in-vitro and in-vivo diagnosis of pollen allergies.