The phrase "act the switch" is not correct and does not convey a clear meaning in written English.
It is unclear when to use it, as it does not appear to be a standard expression or idiom.
Example: "I don't understand what you mean by 'act the switch' in this context."
Alternatives: "make the switch" or "flip the switch".
This study reports the precise tuning of experimental conditions, which act as the switch to direct the course of reaction selectively to obtain either CC oxidative scission or an acid-catalysed rearrangement of vicinal diols.
Exposure of Cys 39 in the D-form of the enzyme under ischaemic conditions may act as the switch preventing excess ROS production by the enzyme during reperfusion.
Under the protocol of the Communications Act, the switch-flicking would be done by the Culture Secretary.
This will act the same way an ignition switch does when on a gas powered car.
When any acceleration, over the threshold value in radial or/and axial direction, acts to the switch, the switch will turn on.
The medfly homolog of tra, Cctra, acts as the switch gene rather than the homologue of Sxl, CcSxl.
A possibility is that a dual motif in both long-tetherin homodimers and mixed heterodimers acts as the switch that targets virions for degradation, whereas stabilization of the short isoform at the surface could enhance opsonization.
This is not the first example: we have recently shown that ataxin-1 (47), another member of the polyQ family, contains a phosphorylation site that acts as the switch that delimits pathology from normal function.
When bladder capacity is reached, the pontine micturition center acts as the switch between storage and voiding and causes inhibition of the sympathetic system and activates the parasympathetic system, resulting in relaxation of the urethral sphincter and a sustained bladder contraction.
But it's also worth acknowledging that almost all presidential candidates try and perform this evolutionary act during the switch from a primary to a general election.
