There is a theoretical protein called largeX that helps to stimulate growth of the body
during adolescence. The promoter on the IrgX gene that codes for it normally can
have a protein bind to it that promotes transcription called largene. Largene, bound
to the promoter, can receive yet another signal in the form of largeXase-a protein
that changes the conformation of largene so that it can no longer bind to the
promoter. What kind of protein is largene?