Der f 35: An MD-2-like house dust mite allergen that cross-reacts with Der f 2 and Pso o 2.

Der f 35 is a candidate major allergen from D. farinae, which is more similar to group 2 allergens from sheep scab mite and storage mites. Der f 35 could be responsible for the cross-reactivity among group 2 mite allergens.