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1·VP7, the most conserved protein of the virion, is serogroup-specific antigen.

VP7蛋白在病毒的各蛋白中最保守，是病毒的血清群特异性抗原。

2·One important aspect of virus replication mechanisms is the way how virion assembly and budding from cell membrane.

对病毒复制机制研究的一个重要方面是病毒的组装和从细胞表面出芽。

3·Neuraminidase (NA) is an important protein on the surface of virion and plays an important role in immune and lethality.

神经氨酸酶（NA）是流感病毒表面的一种重要蛋白质，在免疫和致病方面起重要作用。

4·Expression pattern of trans-activated virion sense promoter was similar to that of complementary sense promoter with the high activity in both mesophyll and vascular of leaf vein.

其表达方式与互补链基因启动子相似，即在叶肉及叶脉维管组织均有较高的活性。