. "\"Any process that modulates the frequency, rate or extent of the addition of an acetyl group to a histone protein.\" [GOC:bf]" . . "regulation of histone acetylation" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .