Remember that cancer involves the loss of control of the cell cycle. This can happen in a variety of ways, but can often involve a change in a tumor suppressor gene or in a proto-oncogene. Considering the differences between these control mechanisms, discuss whether the following proteins are likely to come from a tumor suppressor gene or from a proto-oncogene. Justify each response in a manner worthy of 4 points. The articulation of your reasoning is just as important as the correct answer. Proteins involved in signaling pathways that activate proliferation (cell division)A protein that recognizes and fixes double-strand breaks in DNAA specific transcription factor that represses the promoters of genes involved in cell proliferationA protein that initiates apoptosis (programmed cell death)