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E. coli RNA Polymerase. Sequences of E. coli Promoters. Transcription by E. coli RNA Polymerase. Transcription by E. coli RNA Polymerase. Transcription by E. coli RNA Polymerase. Classes of Genes Transcribed by Eukaryotic RNA Polymerases. Processing of Ribosomal RNAs.

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E. coli RNA Polymerase

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E. coli RNA Polymerase


Sequences of E. coli Promoters


Transcription by E. coli RNA Polymerase


Transcription by E. coli RNA Polymerase


Transcription by E. coli RNA Polymerase


Classes of Genes Transcribed by Eukaryotic RNA Polymerases


Processing of Ribosomal RNAs


Ribosome Structure


and mitochondria


Ribosome Assembly


Structure of tRNAs


Processing of Transfer RNAs


Attachment of Amino Acids to tRNAs


tRNAs are activated by amino-acyl tRNA synthetases


A Eukaryotic Promoter


Formation of a Polymerase II Transcription Complex


Formation of a Polymerase II Transcription Complex


RNA Polymerase II/Mediator Complexes


RNA Polymerase II/Mediator Complexes


DNA Looping


Processing of Eukaryotic Messenger RNAs


Processing of Eukaryotic Messenger RNAs - capping


Processing of Eukaryotic Messenger RNAs – capping and splicing


Eukaryotic genes: mosaic of introns & exons

Introns (intervening sequences)

Exons (expressed sequences)

32


Splicing


Splicing alternativo


Splicing alternativo


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