Why study protein expression? Nucleus Cytosol Inactive mrNA RNA Degradation control Primary DNA RNA mRNA mRNA transcript Translation control RNA pr otein Modifier RNA ransport Transcriptional Processing control proteIn contro control Post-translational control 0/27/2005 Chaoqun Wu, Fudan University10/27/2005 Chaoqun Wu, Fudan University Chaoqun Wu, Fudan University 5 Why study protein expression? Why study protein expression? Nucleus Cytosol Inactive mRNA RNA Degradation control RNA Transport control Translation control Post-translational control Primary RNA transcript Transcriptional control RNA Processing control DNA mRNA mRNA Modified protein protein