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Manual - New England Biolabs

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Luciferase Activity (RLU)<br />

25,000<br />

20,000<br />

15,000<br />

10,000<br />

5,000<br />

RSL1<br />

Addition<br />

RSL1 (500 nM)<br />

DMSO Control<br />

RSL1<br />

Removal<br />

RSL1<br />

Addition<br />

RSL1<br />

Removal<br />

0<br />

0 12 24 36 48<br />

Hours<br />

60 72 84 96<br />

Figure 6: Rapid ON:OFF switch response to two cycles of addition and removal of RSL1.<br />

NIH 3T3 cells were co-transfected with pNEBR-R1 and pNEBR-X1 expressing a destabilized<br />

firefly luciferase and induced with RSL1 followed by removal of RSL1 at 24 hours. A second<br />

cycle of addition/removal of RSL1 results in a new ON:OFF switch response. To remove RSL1<br />

and turn off expression, cells were washed and RSL1-free media was added at the times<br />

indicated. The blue line represents induced expression. The red line represents uninduced<br />

expression.<br />

11

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