The isoelectric point, pl, of the protein beta-glucuronidase is 5.1, while that of ribonuclease T1 is 2.9. What is the net charge of beta-glucuronidase at pH 5.7 ?[ What is the net charge of ribonuclease T1 at pH 1.5 ?[ positive negative

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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### Exercise: Understanding Protein and Amino Acid Charges

The isoelectric point (pI) of the protein **beta-glucuronidase** is **5.1**, while that of **ribonuclease T1** is **2.9**.

**Questions:**

1. **What is the net charge of beta-glucuronidase at pH 5.7?**
   - Options: Positive, Negative

2. **What is the net charge of ribonuclease T1 at pH 1.5?**
   - Options: Positive, Negative

The isoelectric point of **tryptophan** is **5.89**; for **arginine**, it is **10.76**.

3. **During paper electrophoresis at pH 6.5, toward which electrode does tryptophan migrate?**
   - Options: Positive, Negative

4. **During paper electrophoresis at pH 7.5, toward which electrode does arginine migrate?**
   - Options: Positive, Negative

**Interactive Components:**

- **Dropdown Menus:** For selecting the net charge based on pH and pI.
- **Submit Button:** To submit your answers.
- **Retry Button:** Provides 2 more attempts for the group to answer correctly.

Use these concepts to determine the charges and migration directions based on the given pH levels and isoelectric points.
Transcribed Image Text:### Exercise: Understanding Protein and Amino Acid Charges The isoelectric point (pI) of the protein **beta-glucuronidase** is **5.1**, while that of **ribonuclease T1** is **2.9**. **Questions:** 1. **What is the net charge of beta-glucuronidase at pH 5.7?** - Options: Positive, Negative 2. **What is the net charge of ribonuclease T1 at pH 1.5?** - Options: Positive, Negative The isoelectric point of **tryptophan** is **5.89**; for **arginine**, it is **10.76**. 3. **During paper electrophoresis at pH 6.5, toward which electrode does tryptophan migrate?** - Options: Positive, Negative 4. **During paper electrophoresis at pH 7.5, toward which electrode does arginine migrate?** - Options: Positive, Negative **Interactive Components:** - **Dropdown Menus:** For selecting the net charge based on pH and pI. - **Submit Button:** To submit your answers. - **Retry Button:** Provides 2 more attempts for the group to answer correctly. Use these concepts to determine the charges and migration directions based on the given pH levels and isoelectric points.
**Electrophoresis and Isoelectric Points Exercise**

The isoelectric point (pI) of the protein **neuraminidase** is 5.1, while that of **alkaline phosphatase** is 5.7.

1. **Question 1**: What is the net charge of neuraminidase at pH 3.5?
   - Options: Positive, Negative

2. **Question 2**: What is the net charge of alkaline phosphatase at pH 7.5?
   - Options: Positive, Negative

The isoelectric point of **tyrosine** is 5.66, and for **glutamic acid**, it is 3.22.

3. **Question 3**: During paper electrophoresis at pH 4.5, toward which electrode does tyrosine migrate?
   - Options: [Dropdown not visible]

4. **Question 4**: During paper electrophoresis at pH 6, toward which electrode does glutamic acid migrate?
   - Options: [Dropdown not visible]

**Buttons:**
- **Submit Answer**
- **Retry Entire Group** 
  - Note: 2 more group attempts remaining.
Transcribed Image Text:**Electrophoresis and Isoelectric Points Exercise** The isoelectric point (pI) of the protein **neuraminidase** is 5.1, while that of **alkaline phosphatase** is 5.7. 1. **Question 1**: What is the net charge of neuraminidase at pH 3.5? - Options: Positive, Negative 2. **Question 2**: What is the net charge of alkaline phosphatase at pH 7.5? - Options: Positive, Negative The isoelectric point of **tyrosine** is 5.66, and for **glutamic acid**, it is 3.22. 3. **Question 3**: During paper electrophoresis at pH 4.5, toward which electrode does tyrosine migrate? - Options: [Dropdown not visible] 4. **Question 4**: During paper electrophoresis at pH 6, toward which electrode does glutamic acid migrate? - Options: [Dropdown not visible] **Buttons:** - **Submit Answer** - **Retry Entire Group** - Note: 2 more group attempts remaining.
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