BackgroundMountain cedar (Juniperus ashei) pollen commonly causes a winter time allergic rhinitis in the central USA. Jun a 1 is the dominant allergenic protein, but biologically active recombinant Jun a 1 has not been successfully expressed, despite numerous attempts with several expression systems.
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机译：背景雪松（Juniperus ashei）花粉通常在美国中部引起冬季过敏性鼻炎。 Jun a 1是占主导地位的变应原性蛋白质，尽管有多种表达系统的尝试，但尚未成功表达具有生物活性的重组Jun 1 1。
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