These numerous examples of cross-reactions raise another question: why does Bet v 1 cause an allergy to the Mal d 1 protein but not the other way around?

这么多交叉反应的例子提出了另一个问题：为什么Bet v 1会导致对Mal d 1蛋白质的过敏，反过来Mal d 1却不会导致Bet v 1过敏？

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Last week, Fillion, who now stars in ABC's "Castle, " told Entertainment Weekly he'd love to play Mal again.

CNN: Doug Gross