Stuart Aitken Edinburgh University Title: Rule-based modelling of signalling in messenger RNA transcription Abstract: The transcription of messenger RNA is an essential process in the expression of eukaryotic genes. This presentation will outline the key biological steps in this process, their regulation, and the challenges of modelling this process computationally. The dynamic phosphorylation of the C terminal domain of the RNA polymerase enzyme will be discussed in some detail, and comparisons between rule-based and conventional modelling of this regulatory process will be made.