sfa1;yhb1 double mutant cancels out the ability of moderate DR to extend replicative lifespan, but not chronological lifespan. Indicating that NO homeostasis during DR-induced replicative lifespan extension is crucial. Deleting YHB1 partially abolished DR-induced replicative lifespan extension, whereas deleting SFA1 alone had no effect. Yhb1 and Sfa1 may play redundant roles [21584246].
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