There are 2 allergens involved in allergy to brazil nuts.
Ber e 1 is a 2S seed storage albumin protein and Ber e 2 is a 11S globulin seed storage protein. Seed storage proteins are found in all nuts, causing people to be allergic to whole groups of tree nuts.
I have put together some more comprehensive resources at http://www.allergyresources.co.uk/Brazil.php
The allergy resources page for brazil nut covers the key allergens, which allergic syndromes are linked to this allergy and other foods which are commonly cross reactive with brazil nut.
There is also regularly updated links to useful websites specifically for brazil nut allergies and the latest research papers on the topic.
If you have multiple allergies and are interested in how they are linked or want to find out more about food allergies outside the usual top 14 then you can follow me on Facebook or Twitter, where I share a food allergy card every day of the week.
