 However, "mTim" is shown to be necessary for embryonic development in mice, indicating a different gene function than in "Drosophila".This suggests a divergence between mammalian clocks and the "Drosophila" clock.Moreover, mammalian "tim" is more orthologous to the "Tim-2" ("Timeout") paralog of the "Drosophila" "Timeless" gene than the actual gene itself.