The phrase "ascertain a role" is correct and usable in written English.
It can be used when you want to determine or identify a specific function or position within a context, such as a job or responsibility.
Example: "In order to effectively manage the project, we need to ascertain a role for each team member based on their skills and expertise."
Alternatives: "determine a role" or "identify a role".
However, further studies were unable to evoke GABA release in response to stimulus and studies to ascertain a role for GABA neurotransmission in mudpuppy taste cells were inconclusive [16], [42].
Cytokine bioassays were used to ascertain a role for Perna in modulating inflammatory cytokine production.
To ascertain a role for SR-BI and CD81 dynamics in HCV infection, we used fluorescence recovery after photobleaching (FRAP) and single particle tracking (SPT) techniques to quantify receptor and HCV pseudoparticle (HCVpp) diffusion in polarized and non-polarized hepatocytes.
To ascertain a role for MAP1B in Syk-dependent microtubule stability, we induced the expression of Syk-EGFP in MDA-MB-231 cells expressing normal or reduced levels of MAP1B.
To ascertain a functional role for each of the five UGTs in SDG lignan biosynthesis, their full length cDNAs were expressed in yeast.
Importantly, to ascertain a causative role for AGE on myocardial inflammation future studies should be performed investigating the effect of sRAGE or AGE formation blockers.
We followed the expression patterns of bZIP transcription factors to ascertain a potential role of these genes in regulating development in V. dahliae.
However, later research failed to ascertain a preventive role of phyto-oestrogens in breast cancer, possibly because of lack of long-term human dietary intervention trials.
In the present study, to ascertain a possible role of ADMA in FD and determine whether ADMA is a useful marker of cardiac manifestation in FD, we assessed the relationship between serum ADMA levels, CFR and LVMI.
This data together with the fact that ascorbate levels decrease and glutathione levels increase make it difficult to ascertain an important role for this cycle during ripening as it has been described for tomato [ 42].
Mice engineered to lack a specific gene are called "knockout" mice and are a standard way to ascertain a gene's role by seeing what the knockout mouse cannot do.
