Tỏ idéntify transcriptional regulatory elements, reporters containing 100 base pairs of Promoter Region DNA were tested in an expression system, where higher numbers indicate higher expression levels. The black boxes indicate the region mutated in each reporter. Based on these results, if you performed 5' deletion analysis what expression level would you expect from a reporter containing -60 to +1 of the promoter region? Mutant Promoter Region Reporter gene expression +1 number -100 -80 -60 -40 -20 10 40 7.5 10 身

Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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Chapter1: Biochemistry: An Evolving Science
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To identify transcriptional regulatory elements, reporters containing 100 base pairs of Promoter Region DNA were tested in an expression system, where higher numbers indicate higher expression levels. The black boxes indicate the region mutated in each reporter. Based on these results, if you performed 5’ deletion analysis what expression level would you expect from a reporter containing -60 to +1 of the promoter region?

| Mutant number | Promoter Region | Reporter gene expression |
|---------------|-----------------|--------------------------|
|               | -100 | -80 | -60 | -40 | -20 | +1  |
| 1             |      |  ■ |  ■ |  ■ |      |       | 5 |
| 2             |      |  ■ |  ■ |  ■ |  ■ |  ■ | 5 |
| 3             |      |      |  ■ |  ■ |      |  ■ | 10 |
| 4             |      |      |      |  ■ |  ■ |  ■ | 5 |
| 5             |      |  ■ |  ■ |  ■ |  ■ |  ■ | 0 |

Please select the expected expression level from the options below:

- [ ] 0
- [ ] 40
- [ ] 7.5
- [ ] 10
- [ ] 5

**Explanation of Graph:**

Each row represents a mutant with specific regions of the promoter mutated (black boxes). The expression levels are measured for different promoter regions:

- Mutant 1, 2, and 5 have low expression levels at 5 or 0.
- Mutant 3 has the highest expression level at 10.
- Mutant 4 shows a moderate expression level at 5.

Mutations at different regions impact gene expression differently, showing the importance of specific promoter areas in regulating transcription.
Transcribed Image Text:To identify transcriptional regulatory elements, reporters containing 100 base pairs of Promoter Region DNA were tested in an expression system, where higher numbers indicate higher expression levels. The black boxes indicate the region mutated in each reporter. Based on these results, if you performed 5’ deletion analysis what expression level would you expect from a reporter containing -60 to +1 of the promoter region? | Mutant number | Promoter Region | Reporter gene expression | |---------------|-----------------|--------------------------| | | -100 | -80 | -60 | -40 | -20 | +1 | | 1 | | ■ | ■ | ■ | | | 5 | | 2 | | ■ | ■ | ■ | ■ | ■ | 5 | | 3 | | | ■ | ■ | | ■ | 10 | | 4 | | | | ■ | ■ | ■ | 5 | | 5 | | ■ | ■ | ■ | ■ | ■ | 0 | Please select the expected expression level from the options below: - [ ] 0 - [ ] 40 - [ ] 7.5 - [ ] 10 - [ ] 5 **Explanation of Graph:** Each row represents a mutant with specific regions of the promoter mutated (black boxes). The expression levels are measured for different promoter regions: - Mutant 1, 2, and 5 have low expression levels at 5 or 0. - Mutant 3 has the highest expression level at 10. - Mutant 4 shows a moderate expression level at 5. Mutations at different regions impact gene expression differently, showing the importance of specific promoter areas in regulating transcription.
Expert Solution
Step 1

Reporter genes help us to understand and determine the expression of gene of interest by fusing them to regulatory sequences.

They can be used to assay the activity of promoter region by analysing the quantity of product of gene activity

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