Results of retrospective examination into historical snapshots.^*

*<p><i>n</i>_{new_veri} denotes the number of verified genes newly added in updated snapshot of SGD database; <i>n</i>_predicted denotes the overall predicted protein-coding ORFs based on every historical version of SGD database. Take the first snapshot as example, we predict 1784 coding ORFs based on the data of 2004, which covered 99.21% of the 127 newly added verified genes in 2005.