About this Book

Transcription by RNA polymerases is a well-known process in many organisms, mainly at the level of transcription initiation, elongation and termination. Transcriptional process has been well studied in the case of the eukaryotic RNA polymerase II that synthesizes all mRNAs, and also for the bacterial RNA polymerase. However, many aspects of RNA polymerases, including their biogenesis, function, and even their impact in different cellular processes or in health, are still unknown. Moreover it is interesting to delve deeper into knowledge of less-investigated RNA polymerases (such as those from plants or from cellular organelles), to unravel also how these enzymes mediate transcription process and how they impact cellular RNA content and gene expression.