In the absence of growth factors,the retinoblastoma (RB)protein binds a transcription activator called E2F,preventing the cell from entering S stage.A mutation in E2F occurs that causes RB to no longer bind it.This mutant E2F would be considered a(n)

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The mutant E2F that can no longer be bound by RB would lead to uncontrolled cell cycle progression, characteristic of an oncogene.

In the Absence of Growth Factors,the Retinoblastoma (RB)protein Binds a Transcription