Symposia Lectures Monday Monday, July 9, 2007 A2-L1 J. Diffley No abstract available. A2-L2 Molecular bioimaging of gene transcription P. Cramer Gene Center, Munich, GERMANY In the first half of the talk, the current state of our ongoing structure-function analysis of the mRNA transcription cycle will be discussed. The crystallographic structures of the complete 12-subunit RNA polymerase II in free form and with bound DNA and RNA have been determined as atomic models. The structure of the complete Pol II elongation complex bound by the transcript cleavage factor TFIIS explained how Pol II uses a single tunable active site for both RNA synthesis and RNA cleavage
