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Forms of prokaryotic RNA
23S, 18S, 5S
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Forms of Eukaryotic rRNA
28S, 18S, 5.8S, 5S
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Three stages of Transcription
Intiation, Elongation, Termination
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Initiation
- 1.Polymerase binds to promotor region
- 2.Opens the complex
- 3. Cataluzes phosphodiesterase linkage
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Termination
Releases RNA, and dissociates at stop site
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Rifampin
- -Drug treats tuberulosis
- -prevents intiation of rna synthesis byt halting RNA polyermerase for prokaryotes
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Prokaryotic promoter regions
-35 and Prinbow box
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lac operon codes for:
- Z- beta galactosidase
- Y - lactose permease
- A- thiogalactoside transactylase
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Alpha amantin (muschroom) effect
inhibits RNA pol II and partly RNA pol III
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