What makes it possible for proteins to have these elements

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Although all protein structures are unique, there are common structural building blocks that are referred to as regular secondary structures. Some have a helices, some have ß sheets, and still others have a combination of both. What makes it possible for proteins to have these common structural elements?

a.specific amino acid sequences
b.side-chain interactions
c.the hydrophobic core interactions
d.hydrogen bonds along the protein backbone

Reference no: EM13112038

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