Final answer:
The Mediator protein connects proteins on enhancers with those on promoters, enabling transcription initiation by RNA polymerase in eukaryotic cells.
Step-by-step explanation:
The protein responsible for bringing together proteins bound to enhancers with proteins bound to promoters is known as the Mediator. This protein acts as an intermediary by interacting with activator proteins that are attached to enhancers and various other transcription factors and machinery bound to the promoter region.
The Mediator facilitates the transcription initiation process by bridging the interaction between these distant DNA sequences, ensuring that transcription can be carried out effectively by RNA polymerase.