Local divergence score over N-terminal region. Average local divergence scores are shown for the 100 residue N-terminal region of: MTS containing, SP containing, and N-signal-free proteins. Top left panel is calculated from orthologs of yeast curated dataset, and the others from automatically collected orthologs. For the plant dataset, CTP containing proteins are also shown. The error bars denote standard error. For clarity, error bars are only shown for every fifth position.