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What are the different chromatin classifications, and what is their relationship to gene expression?
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Ch. 13 - Regulation of Gene Expression in Eukaryotes
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
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TOC.tableOfContents
- Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution64
- Ch. 2 - Transmission Genetics144
- Ch. 3 - Cell Division and Chromosome Heredity81
- Ch. 4 - Gene Interaction87
- Ch. 5 - Genetic Linkage and Mapping in Eukaryotes103
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages73
- Ch. 7 - DNA Structure and Replication71
- Ch. 8 - Molecular Biology of Transcription and RNA Processing79
- Ch. 9 - The Molecular Biology of Translation110
- Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization100
- Ch. 11 - Gene Mutation, DNA Repair, and Homologous Recombination86
- Ch. 12 - Regulation of Gene Expression in Bacteria and Bacteriophage90
- Ch. 13 - Regulation of Gene Expression in Eukaryotes38
- Ch. 14 - Analysis of Gene Function via Forward Genetics and Reverse Genetics72
- Ch. 15 - Recombinant DNA Technology and Its Applications69
- Ch. 16 - Genomics: Genetics from a Whole-Genome Perspective49
- Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes27
- Ch. 18 - Developmental Genetics43
- Ch. 19 - Genetic Analysis of Quantitative Traits66
- Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels105
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Non è quello che usi tu?Cambia libro di testo
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Sanders 3rd EditionCh. 13 - Regulation of Gene Expression in EukaryotesProblema 11
Sanders 3rd EditionCh. 13 - Regulation of Gene Expression in EukaryotesProblema 11Capitolo 13, Problema 11
Compare and contrast promoters and enhancers with respect to their location (upstream versus downstream), orientation, and distance (in base pairs) relative to a gene they regulate.
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Step 1: Define promoters and enhancers. Promoters are DNA sequences located near the transcription start site of a gene, typically upstream, that serve as binding sites for RNA polymerase and transcription factors to initiate transcription. Enhancers are regulatory DNA sequences that can be located far from the gene they regulate, either upstream or downstream, and enhance the transcription of the associated gene.
Step 2: Discuss the location of promoters. Promoters are usually found immediately upstream of the gene they regulate, often within a few dozen base pairs of the transcription start site. They are generally positioned in a fixed location relative to the gene.
Step 3: Discuss the location of enhancers. Enhancers can be located upstream, downstream, or even within the introns of the gene they regulate. They can be thousands of base pairs away from the transcription start site, providing flexibility in their positioning.
Step 4: Explain the orientation of promoters. Promoters have a specific orientation that is crucial for their function, as they direct the RNA polymerase to transcribe the correct strand of DNA in the correct direction.
Step 5: Explain the orientation of enhancers. Enhancers are orientation-independent, meaning they can function regardless of their direction relative to the gene. This allows them to loop through the DNA to interact with the promoter region and facilitate transcription.
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Promoters
Promoters are specific DNA sequences located upstream of a gene that serve as binding sites for RNA polymerase and transcription factors. They are essential for initiating transcription and are typically found within a few hundred base pairs of the transcription start site. Promoters have a defined orientation, meaning they must be aligned correctly for transcription to occur.
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05:34
Bacteriophage Regulation
Enhancers
Enhancers are regulatory DNA elements that can be located upstream or downstream of a gene, often thousands of base pairs away. Unlike promoters, enhancers can function regardless of their orientation and can significantly increase the transcription of a gene by facilitating the binding of transcription factors. Their distance from the gene allows for complex regulation of gene expression.
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09:16Eukaryotic Transcription
Regulatory Elements
Regulatory elements, including promoters and enhancers, are crucial for controlling gene expression. They interact with transcription factors and other proteins to modulate the transcription process. Understanding the differences in their location, orientation, and distance from the gene is essential for grasping how genes are regulated in response to various cellular signals and conditions.
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05:30Human Transposable Elements
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