A specific amino acid mutation (E230) in short-chain proteins blocked resveratrol activation.

“we found a yeast mutant that and actually a short one mammalian mutant that was blocked that couldn't respond to his vertical was so he already knew that there was an amino acid that was required for this activation by resveratrol in the test tube which told me this isn't just some random thing this is a highly conserved mechanism because we could also show this amino acid was found in other organisms as well in which amino acid was that in short one it's called e 2 30 and the mutation made a lysine so it went from a negative charge to a positive charge at that location”