sigma factor

noun
sig·​ma factor | \ ˈsig-mə- \

Medical Definition of sigma factor

: a detachable polypeptide subunit of RNA polymerase that facilitates the initiation of transcription by recognizing specific DNA promoter sites

Learn More about sigma factor

Share sigma factor

Dictionary Entries near sigma factor

sight

sighted

sightless

sigma factor

sigmatism

sigmoid

sigmoid artery

Comments on sigma factor

What made you want to look up sigma factor? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

someone who never drinks alcohol

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!