title: The licensing checkpoint opens up.
authors.affiliation: University of Dundee, Dundee, UK.
authors.forename: Xin Quan
authors.initials: XQ
authors.lastname: Ge
authors.forename: J Julian
authors.initials: JJ
authors.lastname: Blow
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000502:physiology*; D018797:Cell Cycle Proteins / Q000378:metabolism*; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000378:metabolism; D018844:Cyclin-Dependent Kinases / Q000378:metabolism*; D004261:DNA Replication / Q000502:physiology*; D006801:Humans
chemical_list: D018797:Cell Cycle Proteins; D050759:Cyclin-Dependent Kinase Inhibitor p21; D050760:Cyclin-Dependent Kinase Inhibitor p27; D018844:Cyclin-Dependent Kinases