Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Results 1 - 1 of 1 for Site
  1. ... are turned on and off. Such elements provide sites for specialized proteins (called transcription factors) to attach ( ... many types of regulatory elements: Promoters provide binding sites for the protein machinery that carries out transcription. ...