"may have roles" is correct and usable in written English.
You can use it when indicating that something may have certain attributes or responsibilities. For example, "Animals may have roles in ecosystem health."
Alterations in FGFR2 and NOTCH1 may have roles in local and distant disease progression.
Finally, there is evidence that UV-DDB may have roles in the cell that are distinct from DNA repair.
Peripheral nerve injury induces changes in gene expressions of a variety of neuroactive substances in cell somata, which may have roles in the adaptive response to the injury, neuronal survival, growth and regeneration.
"Our finding of genetic variation in both dogs and wolves provides a possible insight into animal personality, and may even suggest similar genes may have roles in other domestic species (maybe cats even)," said Dr Bridgett vonHoldt of Princeton University.
These data provide a catalog of miR genes that may have roles in cancer and argue that the full complement of miRs in a genome may be extensively involved in cancers.
This raises the possibility that KCNMB subunits may have roles unrelated to BK channels.
The observed high levels of active JNK, as well as p38, may have roles in inducing neuronal cell death independent of c-Jun.
More recently, several Wnts have been shown to be expressed in the developing long bones, suggesting that they may have roles in endochondral bone formation.
This does not rule out the possibility that these genes may have roles in early embryonic development or in the brain [39], [42].
Genes related to the PRC2 components were found in grasses and may have roles in gene regulation that involve changes to chromatin structure.
Two of the CD40-associated proteins we identified, HTRA2 and SMAC, may have roles in the regulation of apoptosis by CD40.
