Oncogenes, Tumor-suppressor genes, and
tumors
For each of the following situations, provide a plausible
explanation for how it could lead to unrestricted cell
division.
Colon cancer cells often contain mutations in the gene encoding
the prostaglandin E2 (PGE2) receptor. PGE2 is a growth factor
required for the division of cells in the gastrointestinal
tract.
Adenovirus, a tumor virus carries a gene for the protein E1A,
which binds to the retinoblastoma protein (Rb).