Table 3. Known food allergens from peanut listed by the WHO/IUIS allergen database (www.allergen.org, January 2026).
| Source | Allergen | MW (kDa) | Functional category |
|---|---|---|---|
| Arachis hypogaea (Peanut) | Ara h 1a,b | 64 | Vicilin, 7S globulin seed storage protein |
| Ara h 2a,b,c,d | 17 | Conglutin (2S albumin) | |
| Ara h 3a,b | 60 | Legumin-like protein | |
| Ara h 5 | 15 | Profilin | |
| Ara h 6a,b | 15 | Conglutin (2S albumin) | |
| Ara h 7 | 15 | Conglutin (2S albumin) | |
| Ara h 8a | 17 | Pathogenesis-related protein, PR-10, Bet v 1 family member | |
| Ara h 9a,b | 9.8 | Non-specific lipid transfer protein type 1 (nsLTP1) | |
| Ara h 10 | 16 | Oleosin | |
| Ara h 11 | 14 | Oleosin | |
| Ara h 12 | < 12 | Defensin | |
| Ara h 13 | < 11 | Defensin | |
| Ara h 14 | 17.5 | Oleosin | |
| Ara h 15 | 17 | Oleosin | |
| Ara h 16 | 8.5 | Non-specific lipid transfer protein type 2 (nsLTP2) | |
| Ara h 17 | 11 | Non-specific lipid transfer protein type 2 (nsLTP2) | |
| Ara h 18 | 21 | Cyclophilin, peptidyl-prolyl cis-trans isomerase | |
| Ara h 19 | 39 | Annexin Gh1 | |
| Ara h 20 | 57 | Seed biotinylated protein SBP65 |
IgE diagnostics available from aThermo Fisher Scientific (Uppsala, Sweden), bDr Fooke (Neuss, Germany), cEuroimmun (Lübeck, Germany), dGold Standard Diagnostics (Kassel, Germany).