promoter

noun4

1. •
   One who promotes.

   • The very language we use to symbolize reality is both product and promoter of the repressive reality of our present consciousness. — 1971
2. •
   One who promotes entertainment events or goods.
3. •
   The section of DNA that controls the initiation of RNA transcription as a product of a gene.
4. •
   An accelerator of catalysis that is not itself a catalyst.