HW 3 - Answers for Hemoglobin.pdf

HW 3 - Answers for Hemoglobin.pdf - 3 Hemoglobin Protein...

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- 1 - 3 Hemoglobin: Protein Structure and Function Before you come to class 1. Produce a reading log for the sections covering myoglobin and hemoglobin. 2. Find an oxygen binding curve for myoglobin in your textbook or on line. How would you describe the shape of this curve? 3. Explore the structure of hemoglobin using Proteopedia. Go to the Proteopedia site ( ) and search for hemoglobin. On the hemoglobin page, explore the structures and answer the following questions. Note that you can rotate the hemoglobin molecule using your mouse and that clicking on green links changes the image of the structure. a. How many subunits does hemoglobin have? What are their conventional names? b. Identify the oxygen binding sites on hemoglobin. How many oxygens can one molecule of hemoglobin bind? How many oxygens can one subunit of hemoglobin bind? c. Identify the central cavity of hemoglobin. Is it the same or different than the oxygen binding site of hemoglobin? 4. Locate a picture of 2,3-bisphosphoglycerate (BPG) binding to the central cavity of hemoglobin in your textbook or on line. Bring a copy to class for use during the activity.
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