A beta sheet is a common structural motif in proteins, characterized by its sheet-like formation. It consists of strands of amino acids that are connected laterally by hydrogen bonds, creating a stable structure. These strands can run parallel or antiparallel to each other, influencing the overall stability and properties of the protein. Beta sheets are part of the secondary structure of proteins, alongside alpha helices. They play a crucial role in the protein's overall shape and function, contributing to the protein's ability to perform its biological tasks. Understanding beta sheets is essential in fields like biochemistry and molecular biology.