. "Any process that decreases the frequency, rate or extent of protein homodimerization, interacting selectively with an identical protein to form a homodimer." . . . "negative regulation of protein homodimerization activity" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .