Beta sheets are a common structural motif in proteins, characterized by strands of amino acids that are arranged side by side. These strands are connected by hydrogen bonds, forming a sheet-like structure. Beta sheets can be parallel, where strands run in the same direction, or antiparallel, where they run in opposite directions. This structure contributes to the overall stability and functionality of proteins. Beta sheets are often found in the core of many proteins, playing a crucial role in their three-dimensional shape. Understanding beta sheets is essential for studying protein folding and function in biological systems.