beta-Pleated Sheet

The image shows a segment of antiparallel beta-pleated sheet. It comprises two polypeptide chains, each of six amino acid residues.

Examine the structure, noting the C- and N-termini, the antiparallel strands, the extended nature of the backbone, the carbonyl-imino hydrogen bonding, the position of the R groups, and the planar nature of the peptide bond.

An image showing parallel beta-pleated sheet is also available.