The phrase "a second role of" is correct and usable in written English.
It can be used when referring to an additional function or responsibility that someone or something has, often in a context where multiple roles are being discussed.
Example: "In addition to her primary duties, she has taken on a second role of project coordinator."
Alternatives: "an additional role of" or "a supplementary role of".
We now report on a second role of BMPs in oligodendrocyte development, regulation of myelin protein expression in immature oligodendrocytes.
A second role of political philosophy is to help citizens to orient themselves within their own social world.
Martin Whitmarsh, who had filled that role since 2009, has not been at work since McLaren announced on 16 January that chairman Ron Dennis had been appointed to a second role of chief executive officer, replacing Whitmarsh, and had been charged with turning the team's fortunes around.
These results show that a second role of Ubx during insect embryogenesis is to regulate the differential enlargement of T3 legs.
However, unlike phosphorylated DevR, isolated DevRC does not interact with the adjacent low affinity binding site suggesting that a second role of DevRN is in cooperative binding to the secondary site.
A second role of the Spc105p/Kre28p complex consists of maintaining the spindle assembly checkpoint -recruited by the conserved Ndc80 complex- to misaligned kinetochores allowing cells sufficient time to correctly orient their sister chromatids on the spindle structure.
A fourth role of political philosophy is reconciliation: "to calm our frustration and rage against our society and its history by showing us the way in which its institutions… are rational, and developed over time as they did to attain their present, rational form" (JF, 3).
A third role of decapping activators is to directly stimulate decapping by Dcp2.
A fifth role of advocating externally to outside groups and building coalitions is suggested as important, but was not strongly represented in our data.
A second role is demarcation of lesions to guide locoregional therapy.
More recently, a plausible second role of GSTs in the development of drug resistance through the inhibition of the mitogen-activated protein (MAP) kinase pathway by protein: protein interactions was evoked (Adler et al, 1999; Townsend and Tew, 2003).
