Transcription Initiation Complex (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Berkeley Lab researchers have produced the first step-by-step snapshots of the assembly of transcription factors and RNA polymerase into a transcription pre-initiation complex. Credit (Image courtesy of Nogales group) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.