'exert a role' is a grammatically correct and usable phrase in written English.
It means to take an active part in an activity or situation and is often used in contexts to do with influencing or playing a part in something. For example, you could say: "Politicians should be prepared to exert an important role in the changing economic landscape."
Now is the time for the federal government to exert a role in this non-federal system.
The mammalian uterine tract immunolocalizes neurotrophins and bFGF; therefore their cognate receptors might exert a role during embryonic development.
Physiological situations characterized by changes in sex steroid plasma levels, such as menstrual cycle, menopause or pregnancy, affect the disease course, suggesting that these molecules might exert a role in this disease.
Such small patches exert a role when the rupture starts and expands.
At face value, these observations suggest that PCNA might exert a role on Ctf7-dependent Smc3 acetylation.
Furthermore, it was recently shown that the transcription coactivator Yap, previously thought to regulate only trophectoderm in the mouse embryo [39], also seems to exert a role in regulation of self-renewal and differentiation in mouse ES cells [83].
The greatest difficulty came over the bloody civil war in Bosnia, with Mr. Boutros-Ghali exerting a role in efforts to end the fighting that was too ambitious for Washington's taste.
Furthermore, C/EBPα exerts a role in chemotherapeutic drugs-induced apoptosis.
Kir channels are involved in the resting membrane potential and conductance, exerting a role in the regulation of cellular excitability [36].
Therefore, it may be possible that DA exerts a role in other calcium transport processes to protect against DCD.
We propose that KIAA0586 exerts a role in intracellular trafficking and cell polarity distinct from its role in docking of the centriole.
