MICR 3330 Chapter Notes - Chapter 1: Peptide, Start Codon, N-Terminus

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Transcription: unlike prokaryotic rna polymerase that initiates the transcription of all different types of rna, rna polymerase in eukaryotes (including humans) comes in three variations, each encoding a different type of gene. Rna polymerase i is responsible for transcribing rna that codes for genes that become structural components of the ribosome, a protein responsible for the translation of rna into proteins. Rna polymerase ii transcribes protein-encoding genes, or messenger rnas, which are the rnas that get translated into proteins. Rna polymerase iii transcribes a different structural region of the ribosome, transfer. Rnas, which are also involved the translation process, as well as non-protein encoding. The promoter regions for rna polymerases i and ii are located upstream of the start site, but the promoter for polymerase iii is oddly located downstream. One key difference between prokaryotic and eukaryotic transcription is that eukaryotic polymerases are unable to recognize promoter regions.

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