Final answer:
Blimp-1 represses the expression of the transcription factor Bcl-6.
Step-by-step explanation:
The expression of Blimp-1 protein represses the expression of transcription factor Bcl-6. Blimp-1 is a transcription factor that plays a role in regulating gene expression. When it is present, it inhibits the activity of Bcl-6, which is another transcription factor involved in regulating the immune response.