Comparative analyses of time-course gene expression profiles of the long-lived sch9Delta mutant.

In fact, the distribution of volatility versus trend in the sch9Δ exhibited an up-side-down T-shape, indicating that the expressions of a portion of genes fluctuated but did not exhibit an obvious trend. rRNA processing gene expressions were more volatile in the sch9Δ mutant In S. cerevisiae , three of the four rRNAs (18S, 5.8S and 25S) are first transcribed by RNAP I, as a single 35S rRNA precursor; the other rRNA (5S) is transcribed by RNAP III ( 42 ).

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