L-2-Aminooxy-3-phenylpropanoic acid hydrobromide is primarily used in biochemical research as a tool for studying enzyme mechanisms and protein interactions. It acts as an inhibitor for certain enzymes, particularly those involved in amino acid metabolism, making it valuable for understanding biochemical pathways. Additionally, it is utilized in the synthesis of peptide derivatives and other organic compounds, aiding in the development of novel pharmaceuticals. Its ability to mimic natural amino acids allows researchers to probe the structure and function of proteins, contributing to advancements in drug design and molecular biology.