【在 b******k 的大作中提到】 : gfp usually only take overnight to get expressed, if use cmv promoter
B*o
24 楼
你问题里提到的24小时候之看到很少的细胞是GFP+。 这是infected的吧? infected cells need at least 2 days to express the transgenes. 如果你仅仅在 24小时后就去check GFP,很难看到positive的细胞。应该多留一下,过一天再看,才 能知道你的virus titer到底如何。 如果2-3天后,infected的细胞里GFP+的还很少。那么说明你virus titer很低。这时候 你得去查是不是transfection效率不够,如果不是,那么说明你的packaging plasmid 或者packaging cells不好。
我的理解Lentivirus 是慢的,不会很快见到GFP。摘自维基百科: Lentivirus (lenti-, Latin for "slow") is a genus of slow viruses of the Retroviridae family, characterized by a long incubation period. Lentiviruses can deliver a significant amount of genetic information into the DNA of the host cell and have the unique ability among retroviruses of being able to replicate in non-dividing cells。