From delipidated peanut extract by multi-step chromatography. Purity on silver stained SDS-PAGE >95%.

Preservative-free and carrier-free in phosphate buffered saline, pH 7.4. Sterile filtered.

(1) Ara h 2 appears as a doublet. (2) Trace level of Ara h 1 is <0.05% (3) Endotoxin content is < 5.0 EU/μg.

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2. Sen M, Kopper R, Pons L, Abraham EC, Burks W, Bannon GA. Protein structure plays a critical role in peanut allergen stability and may determine immunodominant IgE-Binding epitopes. J Immunol 2002;169:882-7.
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4. Flinterman AE, van Hoofen E, den Hartog Jager CF, Koppelman S, Pasmans SG, Hoekstra MO, Bruijnzeel-Koomen CA, Knulst AC, Knol EF. Children with peanut allergy recognize predominantly Ara h2 and Ara h 6, which remains stable over time. Clin Exp Allergy 2007;37:1221-8.
5. McDermott RA, Porterfield HS, El Mezayen R, Burks AW, Pons L, Schlichting DG, Solomon B, Redzic, JS, Harbeck RJ, Duncan MW, Hansen KC, Dreskin SC. Contribution of Ara h 2 to peanut-specific, immunoglobulin E-mediated, cell activation. Clin Exp Allergy 2007;37:752-763.