The most studied proteins in apple allergy are called Mal d 1, Mal d 2, Mal d 3 and Mal d 4.
87% of people suffering from this allergy are thought to be sensitised to the protein Mal d 1, but may be allergic to other combinations of proteins.
You may have Pollen-Food Allergy Syndrome if you suffer from apple allergy with oral allergy symptoms to 3 or more of the foods mentioned in cross reactivity section.
Proteins with similar protein structures are Strawberry, Raspberry, Asparagus, and Mango
If sensitised to Alder pollen you may have Pollen Food Allergy Syndrome and may also react to Cherry, Peach, Pear, Parsley, Celery, Almonds, and Hazelnuts
If sensitised to Birch pollen you may have Pollen Food Allergy Syndrome and may also react to Kiwi, Pear, Peach, Plum, Nectarine, Apricots, Cherries, Tomato, Celery, Carrot, Potato, Parsnip, Pepper, Dill, Cumin, Peas, Coriander, Fennel, Hazelnut, Walnut, Almonds, Peanuts, Lentils and Beans
If sensited to Mugwort pollen you may have Pollen Food Allergy Syndrome and may also react to, Celery, Carrots, Dill, Parsley, Fennel, Coriander, Cumin, and Sunflower seeds