There are 5 allergens in pistachio nuts. Pis v 1, 2, 3, 4 and 5.
Pis v 1 is a 2S albumin, Pis v 2 and 5 are 11S proteins, Pis v 3 is a vicilin protein and Pis v 4 is a manganese superoxide dismutase which is a plant enzyme.
Pistachio allergy is not currently associated with any allergic syndromes.
Other food containing 2S albumin seed storage proteins are cashews, peanuts, brazil nuts, mustard seed, rapeseed, turnip, chickpeas, hazelnuts, pecan nuts, buckwheat, soya, sunflower seeds, walnuts, kiwi, castor beans and sesame seeds.
Other foods containing vicilin like proteins not mentioned in the list above are lupin, lentils, macadamia, peas and mung bean.