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11 December, 09:00

Beta (?) sheets are a type of secondary structure in proteins. A segment of a single chain in an antiparallel? sheet has a length of 94.5 Å. How many residues are in this segment?

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  1. 11 December, 09:06
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    The correct answer is 27 residues.

    Explanation:

    In an antiparallel beta sheet, there is a repeat for every 7 Angstrom units and the number of residues is two for every repeat. In an antiparallel sheet that exhibits a length of 94.5 Angstrom, the number of residues can be determined by using the following formula:

    2 residues per every 7 Angstrom,

    Length of the given segment is 94.5 Angstrom

    Number of residues in this segment are:

    = (number of segments) * (residues per segment)

    = (94.5/7) * 2

    = 13.5 * 2

    = 27 residues.

    Thus, the number of residues in this segment is 27.
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