Summary of subcellular localization studies. A schematic representation of the N-terminal part of the Cdc17 protein showing, in cartoon form, the structures of the mutant proteins whose localization was examined by GFP fusion. In two cases, although nuclear fluorescence was detectable, this was only at a very low level; these are indicated as (+). PIP box, PCNA binding motif. NLS, nuclear localization sequence. MTS, mitochondrial targeting sequence.