3Zheng N,Schulman BA,Song L,et al.Structure of the Cul1-Rbx1-Skp1-F boxSkp2 SCF ubiquitin ligase complex.Nature,2002,416:703～709.
4Passmore LA,Booth CR,Venien-Bryan C,et al.Structural analysis of the anaphase-promoting complex reveals multiple active sites and insights into polyubiquitylation.Mol Cell,2005,20:855～866.
5Hoppe T.Multiubiquitylation by E4 enzymes:'one size' doesn't fit all.Trends Biochem Sci,2005,30:183～187.
6Hochstrasser M.Lingering mysteries of ubiquitin-chain assembly.Cell,2006,124:27～34.
7Nijman SM,Luna-Vargas MP,Velds A,et al.A genomic and functional inventory of deubiquitinating enzymes.Cell,2005,123:773～786.
8Welchman RL,Gordon C,Mayer RJ.Ubiquitin and ubiquitin-like proteins as multifunctional signals.Nat Rev Mol Cell Biol,2005,6:599～609.
