• [[promoters]] of promoters
  • instructing the promoter when, where, and at what levels to turn on gene transcription
  • reside on open [[chromatin]]
  • activated by binding of [[Transcription factor]]
  • can be cis (on the same chromosome) or trans (on another chromosome) from the gene they regulate
  • each gene can have multiple enhancers
  • same enhancer can control different genes