Not everyone can enjoy the fresh strawberries in summer. Some experience an allergic reaction with itching and swelling in mouth and throat. Biochemists at Lund University have identified a strawberry allergen among the thousands of proteins in a strawberry. Screening is now performed to find strawberries with no or little of the allergen protein. Sofar, a colourless, ’white’ strawberry variety has been found to be virtually free from the allergen.
The allergen was identified using blood sera from patients experiencing adverse reactions to strawberry. The protein then discovered turned out to be a not completely unknown one. "This protein resembles a previously known allergen in birch pollen," says Cecilia Emanuelsson at the Dept of Biochemistry. A primary allergy against birch pollen can in turn evoke secondary allergic reactions against berries, fruit and some vegetables. That does not necessarily mean that all birch pollen allergic individuals react against strawberries. But some do; and some face the risk of developing such secondary adverse reactions. Birch-pollen related food allergy is a well-known phenomenon and especially common in Northern Europe, but the actual number of persons affected today is difficult to estimate.
There are some observations among breeders that allergic individuals can eat a white strawberry variety without problems. When the research group in Lund investigated such a white strawberry they found that it contained very little of the strawberry allergen. In Sweden breeders have worked for some time with breeding to improve the quality of white strawberries to become as tasty as the red ones. Some plant shops occasionally provide plants of white strawberry. "The allergen is in some way or other related to the red colour but it is not clear exactly how, we need to investigate more proteins," says Rikard Alm.
Scientists identify spark plug that ignites nerve cell demise in ALS
25.08.2016 | Harvard Medical School
Recommended blood pressure targets for diabetes are being challenged
24.08.2016 | University of Gothenburg
Scientists and engineers striving to create the next machine-age marvel--whether it be a more aerodynamic rocket, a faster race car, or a higher-efficiency jet...
Waveguides are widely used for filtering, confining, guiding, coupling or splitting beams of visible light. However, creating waveguides that could do the same for X-rays has posed tremendous challenges in fabrication, so they are still only in an early stage of development.
In the latest issue of Acta Crystallographica Section A: Foundations and Advances , Sarah Hoffmann-Urlaub and Tim Salditt report the fabrication and testing of...
Electrochemists at TU Graz have managed to use monocrystalline semiconductor silicon as an active storage electrode in lithium batteries. This enables an integrated power supply to be made for microchips with a rechargeable battery.
Small electrical gadgets, such as mobile phones, tablets or notebooks, are indispensable accompaniments of everyday life. Integrated circuits in the interiors...
Recent findings indicating the possible discovery of a previously unknown subatomic particle may be evidence of a fifth fundamental force of nature, according...
A nanocrystalline material that rapidly makes white light out of blue light has been developed by KAUST researchers.
25.08.2016 | Event News
24.08.2016 | Event News
12.08.2016 | Event News
26.08.2016 | Life Sciences
26.08.2016 | Life Sciences
25.08.2016 | Power and Electrical Engineering