sigma factor

n.

A protein component of RNA polymerase that determines the specific site on DNA where transcription begins.

Nearby words

  1. sigismund ii,
  2. sigla,
  3. siglos,
  4. sigma,
  5. sigma baryon,
  6. sigma particle,
  7. sigmate,
  8. sigmation,
  9. sigmatism,
  10. sigmoid


The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.