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Two of the major allergens in the pollen of short ragweed are Amb a I and Amb a II (formerly antigen E and antigen K, respectively). The genes for Amb a I and Amb a II have recently been cloned, and it was shown that Amb a I is a family of proteins with at least three distinct polymorphic family members. This study addresses the number of individual Amb a I and Amb a II family members, the polymorphism in each family member and the expression of these genes in ragweed plants from different geographical locations. This work led to the cloning and characterization of a fourth Amb a I family member, designated Amb a I.4.

Citation

I J Griffith, J Pollock, D G Klapper, B L Rogers, A K Nault. Sequence polymorphism of Amb a I and Amb a II, the major allergens in Ambrosia artemisiifolia (short ragweed). International archives of allergy and applied immunology. 1991;96(4):296-304

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PMID: 1809687

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