Choose the true statements about amyloid fibrils. An amyloid fibril typically forms from aggregates of misfolded peptides resulting from frameshift mutations. Proteins that convert to an amyloid fibril structure tend to have low solubility in their native form. An amyloid fibril is stabilized by hydrophobic interactions between aromatic residues. Nucleation of amyloid structure may be triggered when two ?-sheet regions from two partially folded proteins associate. Soluble proteins that misfold and form amyloid fibrils become insoluble.
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Choose the true statements about amyloid fibrils. Proteins that convert to an amyloid structure form soluble fibrils. Amyloid fibrils have a high amount of ̑-helical structure. Nucleation of amyloid structure may be triggered when two ̒-sheet regions from two partially folded proteins associate. Proteins that form amyloid fibrils are normally soluble. Some amyloid fibrils are formed from proteolytic fragments that self-assemble into extended ̒-sheet structures.
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Which of the following statements concerning the process of spontaneous folding of proteins is false? It may involve gradually decreasing range of conformational species It may be defective in some human diseases It may be an essentially random process It may involve initial formation of highly compact state It may involve initial formation of local secondary structure
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