http://www.nature.com/cr/journal/v26/n12/index.html;新增2篇free文章，Type I CRISPR-Cas targets endogenous genes and regulates virulence to evade mammalian host immunity http://www.nature.com/cr/journal/v26/n12/full/cr2016135a.html；USP18 recruits USP20 to promote innate antiviral response through deubiquitinating STING/MITA http://www.nature.com/cr/journal/v26/n12/full/cr2016125a.html