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宿主细胞依赖多种免疫应答机制来对抗病毒感染。其中，针对核酸分子的免疫识别和操作，是极为核心的抗病毒免疫策略，其广泛存在于从细菌到哺乳动物等几乎所有宿主系统中（图-1）。相较于哺乳动物细胞稍显复杂的信号转导和调控，细菌往往更为简单高效，其编码的多种抗病毒免疫系统可直接对核酸分子进行切割或修饰（图-1）。这种特点也使得细菌免疫系统被广泛用于多种生物学工具的开发（如R-M和CRISPR-Cas等），极大...
Weather surveillance radar data shows 45 million insects taking flight over brightly lit city（图）
Weather surveillance radar data 45 million insects flight lit city
2021/4/16
The expansion of artificial night lights globally has had important impacts on animal behavior and health. A new study led by researchers at the University of Oklahoma on the effects of brig...
Weather radar records drastic drop in mayfly populations（图）
Weather radar drastic drop mayfly populations
2020/2/20
At the beginning of each summer, mayfly larvae emerge from bodies of water and shed their skin to become full-fledged mayflies, similar to the way in which caterpillars become butterflies.