For each of the following cartoon representations from left to right, indicate whether the protein structure is composed of only ? helices (1), only parallel ? sheets (2), only antiparallel ? sheets (3), ? helices plus parallel ? sheets (4), or ? helices plus antiparallel ? sheets (5) as repetitive secondary structure elements. Your answer would be a four-digit number composed of digits 1 to 5 only, e.g. 5513.
Images created in PyMOL, from PDB entries 1STU, 2LPC, 1SA8, and 3BOB.
Correct Answer:
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Q1: The number of ways in which protein
Q3: Which of the following is NOT the
Q4: You have purified a multisubunit extracellular protein
Q5: Which of the following pairs of amino
Q6: Many viruses have large capsids in the
Q7: An amino acid residue that is not
Q8: Imagine a cellular protein composed of 3000
Q9: Which of the following stretches of amino
Q10: At physiological pH, what is the approximate
Q11: Which of the following is NOT true
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