The phrase "predominant role of" is correct and usable in written English.
You can use it when referring to an individual or group of people playing a more significant role in a certain situation or activity than others. For example, "The predominant role of women in the workforce has been an important factor in the economic success of many countries."
Kirchhoff, K. et al. Impact of different fat depots on insulin sensitivity: predominant role of liver fat.
Saffarzadeh, M. et al. Neutrophil extracellular traps directly induce epithelial and endothelial cell death: a predominant role of histones.
The predominant role of crust setting in the CO2 release response was demonstrated.
Studies show that the predominant role of agriculture in the labour market for poorer people has declined as more people head to cities to find work.
In spite of the predominant role of the British along the coast, in 1884 the Germans claimed the region as Kamerun.
Fukumura, D. et al. Predominant role of endothelial nitric oxide synthase in vascular endothelial growth factor-induced angiogenesis and vascular permeability.
Bryant, V.L. et al. Cytokine-mediated regulation of human B cell differentiation into Ig-secreting cells: predominant role of IL-21 produced by CXCR5+ T follicular helper cells.
In his ruling, Judge Gergel noted the "traditionally predominant role of the federal government in the field of immigration".
A key feature of this weakness has been the predominant role of rent-seeking interest groups in Greece's policy-making structure at the expense of (civil) society.
These three mechanisms explain the predominant role of the highest velocity of the oscillatory airstream in determination of the mean burning rate constant and droplet lifetime.
We discuss the predominant role of Rabl-like configuration for interphase chromosome organization and the dynamic changes that occur during mitosis and meiosis.
