Peanut flour was purchased from the Golden Peanut Company (Alpharetta, Ga), endotoxin was undetectable (<0.5 EU/mg flour) as previously described (7 (link)). Crude peanut extract (7 (link)) and Alternaria alternata extract (19 (link)) were purchased from Greer Laboratories (Lenoir, NC). Recombinant IL-1α was purchased from R&D Systems (Minneapolis, MN), and recombinant IL-13 was purchased from Biolegend (San Diego, Ca).