The phrase "actual function of" is correct and usable in written English.
It can be used when discussing the true or real purpose or role of something in a specific context.
Example: "The actual function of the heart is to pump blood throughout the body."
Alternatives: "true role of" or "real purpose of".
To unravel the actual function of the C-terminus region, we carried out functional analysis of WA PKS mutants by C-terminus deletion and site-directed mutagenesis.
The grim Nazi slogan was so counter to the actual function of the camp that it has been etched into history.
We used an in vitro model to explore the function of P2X7R under inflammatory conditions, though the actual function of P2X7R in vivo should be explored.
If Franklin was wrong about preventing lightning, with this latter suggestion he hit on the actual function of a lightning rod.
This and other features have raised questions about the actual function of AI-2 inside the cell.
The actual function of this object, in life or death, is mysterious, but it has the aspect of a diadem (its circumference is that of a smallish man's hat), and the show's organizers are calling it "the world's oldest crown".
Comedy has been a loyal bedfellow of hip-hop since at least 1989, when De La Soul's album "3 Feet High and Rising" introduced the between-song skit: a charmingly amateurish, often-interminable slapstick interstitial, the actual function of which remains mostly unclear.
And then you want to understand well what are the tradeoffs as you weigh both this public image as well as the internal actual function of how this space will change behaviors and different spaces for different companies with different cultures do different things.
To assess whether the portions of the semitendinosus and gracilis tendons harvested for anterior cruciate ligament reconstruction have the potential to regenerate and, if so, to evaluate the histologic properties and actual function of this newly formed tissue.
Furthermore, this set-up enables biological data to be presented as an actual function of deposited mass obtained in real-time during exposure (Table 1).
He criticized theories that tried to derive moral principles from self-certifying reason, or intuition, or cosmic forms, or divine commands, both because he thought there are no self-certifying faculties or self-evident norms, and because the alleged derivation disguises the actual function of the principles as devices for social action.
