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. The strands can run in the same direction, known as parallel beta sheets, or in opposite directions, called antiparallel beta sheets. The presence of beta sheets contributes to the overall stability and functionality of proteins. They are often found in the core of globular proteins and play a crucial role in the formation of protein domains, which are essential for various biological processes.