As translation proceeds, the nascent polypeptide chain passes through a tunnel in ... directly visualize density consistent with α-helix formation in the tunnel as well as the sites of ...

Amyloid fibrils contain a core structure of polypeptide chains arranged in antiparallel ... amyloid polypeptide molecule involved in the formation of amyloid fibrils — that is, amino acids ...

Each amino acid within this polypeptide chain has a different property ... Hydrolysis of ATP then initiates the formation of an enclosed state, called the folding-active state.

Llamas, unlike most mammals, produce antibodies composed of a single polypeptide chain ... cysteine-containing peptides due to unintended disulfide formation between the peptide and heavy chain ...