McKnight lab has shown that when you grow yeast to saturation, then starve them for > 4h, then allow them to grow in a chemostat (constant glucose supply; dilution rate 0.1 hours ^-1; limited oxygen), they undergo metabolic cycling. HAP1 expression seems to correlate with O2 levels and ROX1 expression seems to peak just after peak of dO2 (dissolved oxygen).
Note that they only see metabolic cycles in two prototrophic strains, and not in lab strains BY and W303.
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