# Please answer 8. Quaternary structure: The image below is of a polypeptide in quaternary (4°) structure...

###### Question:

8. Quaternary structure: The image below is of a polypeptide in quaternary (4°) structure level of protein folding. The image to the left is of hemoglobin. It is composed of four separate polypeptide chains indicated by the color differences. The image on the right indicates the backbone items as a ribbon (or line), while the side chains are chemically drawn. a. Name the specific bond/interaction indicated by the: i. Letter A ii. Letter B iii. Letter C iv. Letter D b. Are these bonds/interactions/linkages covalent or non-covalent? c. Are these bonds/interactions permanent or transient? What parts of the amino acid (backbone or side chain) are involved in these bonds/interactions/linkages? e. Are these bonds/interactions/linkages between amino acids in the same polypeptide or different polypeptide? dB Three polypeptide chains CHCH. CH.CH E----- D (CH Quatemary structure: the four separate chains of hemoglobin assembled into an oligomeric protein os

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