%0 Journal Article %T Differential phosphorylation of vertebrate p34cdc2 kinase at the G1/S and G2/M transitions of the cell cycle: identification of major phosphorylation sites. %A Krek, W. %A Nigg, E. A. %J The EMBO Journal %V 10 %N 2 %P 305-316 %@ 0261-4189 %D 1991-02-01 %I Nature Publishing Group UK %~ DeepDyve