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The secondary protein structure describes the first step in how the amino acid sequence starts to fold in three dimensional space.

Although the primary structure maybe simple, it is key in determining how the protein folds as it is the interactions between amino acids that govern subsequent folding. The primary protein structure is the simplest way to describe a protein, and is simply the linear sequence of amino acids that makes up the peptide chain. Download a printable version of this document here.Ī proteins three dimensional structure is complex, however it can be broken down to allow a greater understanding of how a protein folds into its complex three dimensional structure.