There are 3 food allergens associated with turnip allergy.
Bra r 1 is a 2S albumin protein
. These are seed storage proteins most commonly found in nuts and seeds.
Bra r 2 is prohevein protein which is used in the plant for defence.
Bra r 3 is a polcalcin protein. These are commonly called panallergens and are usually associated with airway allergens (pollens). In turnips this allergen is unique as it has been identified as a food allergen.
Turnips contain prohevein which is similar in shape to those of latex plants, which can cause those suffering from Latex Food Syndrome
to have allergic reactions to turnips.
Other food containing 2S albumin seed storage proteins are cashews, peanuts, brazil nuts, mustard seed, rapeseed, pecans, chickpeas, hazelnuts, pistachio, buckwheat, soya, sunflower seeds, walnuts, kiwi, castor beans and sesame seeds.
Those with a sensitivity to hevein may have linked allergies to foods which contain high levels of chitinase, like banana, avocado, chestnuts, corn (maize), kiwi, papaya, pomegranate and tomatoes.
Other plants which contain polcalcin proteins as airway allergens are alder, ragweed, wormwood, birch, olive and lilac.
Science Direct - Brassica Rapa
Allergy information for: Turnip (Brassica rapa)
Articles and Journals
Sensitization and allergy to turnip rape: a comparison between the Finnish and French children with atopic dermatitis, 2009
2S Albumin Storage Proteins: What Makes them Food Allergens?, 2008
Turnip and zucchini: New vegetables responsible for cross reactivity between latex and plant-derived foods, 2007
Napins, 2S albumins, are major allergens in oilseed rape and turnip rape, 2006
Allergy to turnip greens, 2004
Increased allergen production in turnip (Brassica rapa) by treatments activating defense mechanisms, 1999
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