In a Teritary level Lab it is observed that chronic, increased exposure to ionizing radiation results in damage to cellular DNA. As a consequence, a protein is now absent that would arrest the cell in the G1 phase of the cell cycle. Subsequent to this, the cell is transformed to acquire the propey of unregulated growth. The absent protein is most likely the product of which of the following genes?
p53
RAS
VHL
p53
MYC