1. Lock and Key to Transcription: σ-DNA Interaction
Xin Liu, David A. Bushnell, Roger D. Kornberg 
Cell 
Volume 147, Issue 6, Pages (December 2011)
DOI: /j.cell
Copyright © 2011 Elsevier Inc. Terms and Conditions

2. Figure 1
Sequence-Specific Recognition of the −10 Element by Region 2 of σ
The DNA backbone is represented by solid purple circles, bases of the nontemplate strand by yellow polygons, and bases of the template strand by cyan polygons. The sequence of the nontemplate strand corresponds to the consensus of the −10 element, 5′-T−12A−11T−10A−9A−8T−7-3′. Region 2 of σ is shown as a green polygon.
Cell  , DOI: ( /j.cell )
Copyright © 2011 Elsevier Inc. Terms and Conditions