Pollen is one of the most common allergens that cause respiratory allergies worldwide. Pollen grains from poplars have been reported as important sources of pollinosis in many countries.

中文翻译：

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Pop n 2 的分子和免疫化学表征：一种新的黑杨花粉过敏原

花粉是全球最常见的引起呼吸道过敏的过敏原之一。据报道，来自杨树的花粉粒在许多国家是花粉病的重要来源。