How should we know? How is this related to bioinformatics?
Because you find the resonant frequency of Microtubules via Signal Processing, and because machines that can measure these things by eliminating random quantum noise from the data have been around since 1999. They were produced by Thomas Swann (the ID10). There’s been several cropping up on the market for years and I thought someone might have bothered themselves to get more accurate measurements by now.
The exact measurement would be a big thing to everyone interested in the Hammeroff/Penrose Orch OR model, and probably of interest to people researching Alzheimers too – as that’s a disease of the Microtubules. It’s possible that non invasive therapies could result.