O ?-strands in a parallel ?-sheet cannot be connected by a B-turn. O An amphipat

Question

O ?-strands in a parallel ?-sheet cannot be connected by a B-turn. O An amphipathic B-strand consisting of 14 residues is expected to have residues with side chains of the opposite nature in the 1st 7 residues as compared the last 7 residues. O ?-strands can differ in length within a single ?- sheet. O Residues within antiparallel and parallel B-sheets are expected to have differing phi and psi angles. 0 ?-sheets can form between two different subunits in a protein that exhibits quaternary structure.

Explanation / Answer

All the statements are true except

An amphipathic ?-strand consisting of 14 residues is expected to have residues with side chains of the opposite nature in the 1st 7 residues as compared the last 7 residues.

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