promoter

n. one who advances, one who encourages; entrepreneur, one who participates in a business initiative

For other uses of this word, see promoter (disambiguation).In biology, a promoter is a regulatory region of DNA located upstream (towards the 5' region) of a gene, providing a control point for regulated gene transcription.
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Promoter /pro·mo·ter/ 1. a segment of DNA usually occurring upstream from a gene coding region and acting as a controlling element in the expression [more]Promoter - Community and Resources

Noun
1. someone who is an active supporter and advocate
(synonym) booster, plugger
(hypernym) advertiser, advertizer, adman
(hyponym) barker
(derivation) advertise, advertize, promote, push
2. a sponsor who books and stages public entertainments
(synonym) showman, impresario
(hypernym) booker, booking agent
(hyponym) exhibitor, exhibitioner, shower

(n.)
Specifically, one who sets on foot, and takes the preliminary steps in, a scheme for the organization of a corporation, a joint-stock company, or the like.
  

(n.)
One who, or that which, forwards, advances, or promotes; an encourager; as, a promoter of charity or philosophy.
  

(n.)
One who excites; as, a promoter of sedition.
  

(n.)
An informer; a makebate.