<prompt> Answer this question truthfullyWhat is the name of the tumor suppressor gene that produces a protein that has the ability to inhibit a specific factor, and what is the name of that factor?  <response>: <reason> The tumor suppressor gene is called VHL, and its product has the ability to inhibit hypoxia inducible factor 1-α HIF-1α, which is a transcription factor involved in cellular response to low oxygen levels. 