
What is the primary structural characteristic of beta sheets that gives them the name 'pleated sheets'?
How do interchain hydrogen bonds in beta sheets differ from those in alpha helices?
In a diagram of beta sheets, how is the directionality of beta strands typically represented?
Why are phi and psi bond angles significant in the context of beta sheets?
What is the maximum number of beta strands that can be found in a beta sheet?
How do the structural differences between parallel and antiparallel beta sheets influence their stability?
In what way does the pleated structure of beta sheets contribute to the mechanical properties of materials like silk?