美国一家名为SMaL Camera Technologies的厂商．在CES2001国际电子消费展上．展出一部厚度只有6mm的卡片型数码相机“Ultra-Pocket Digital Camera”．而重量连锂电池也只有63．3克!一般的轻巧数码相机．都是用内置内存来储存数码相片...美国一家名为SMaL Camera Technologies的厂商．在CES2001国际电子消费展上．展出一部厚度只有6mm的卡片型数码相机“Ultra-Pocket Digital Camera”．而重量连锂电池也只有63．3克!一般的轻巧数码相机．都是用内置内存来储存数码相片．而这部SMaL出品的卡片型数码相机，竟然是可以用MMC卡来存相．即使大家如果嫌随机附送的8MB卡容量不够．也随时可以多买几张大容量的MMC卡来用。展开更多
Small ubiquitin-like modifier(SUMO)ylation is a key posttranslational modification mechanism that controls the function of a plethora of proteins and biological processes. Given its central regulatory role, it is not ...Small ubiquitin-like modifier(SUMO)ylation is a key posttranslational modification mechanism that controls the function of a plethora of proteins and biological processes. Given its central regulatory role, it is not surprising that it is widely exploited by viruses. A number of viral proteins are known to modify and/or be modified by the SUMOylation system to exert their function, to create a cellular environment more favorable for virus survival and propagation, and to prevent host antiviral responses. Since the SUMO pathway is a multi-step cascade, viral proteins engage with it at many levels, to advance and favor each stage of a typical infection cycle: replication, viral assembly and immune evasion. Here we review the current knowledge on the interplay between the host SUMO system and viral lifecycle.展开更多
文摘美国一家名为SMaL Camera Technologies的厂商．在CES2001国际电子消费展上．展出一部厚度只有6mm的卡片型数码相机“Ultra-Pocket Digital Camera”．而重量连锂电池也只有63．3克!一般的轻巧数码相机．都是用内置内存来储存数码相片．而这部SMaL出品的卡片型数码相机，竟然是可以用MMC卡来存相．即使大家如果嫌随机附送的8MB卡容量不够．也随时可以多买几张大容量的MMC卡来用。
文摘Small ubiquitin-like modifier(SUMO)ylation is a key posttranslational modification mechanism that controls the function of a plethora of proteins and biological processes. Given its central regulatory role, it is not surprising that it is widely exploited by viruses. A number of viral proteins are known to modify and/or be modified by the SUMOylation system to exert their function, to create a cellular environment more favorable for virus survival and propagation, and to prevent host antiviral responses. Since the SUMO pathway is a multi-step cascade, viral proteins engage with it at many levels, to advance and favor each stage of a typical infection cycle: replication, viral assembly and immune evasion. Here we review the current knowledge on the interplay between the host SUMO system and viral lifecycle.
