(S)-3-(Allylthio)-2-aminopropanoic acid is primarily used in the field of biochemistry and pharmaceutical research. It serves as a key intermediate in the synthesis of various biologically active compounds, particularly those with potential therapeutic applications. Its structure is valuable in the development of peptide-based drugs, where it can be incorporated to modify the properties of peptides, such as enhancing stability or altering receptor binding affinity. Additionally, it is utilized in studies related to enzyme inhibition, where it can act as a substrate or inhibitor to explore enzymatic mechanisms. This compound is also of interest in the design of prodrugs, where its functional groups can be leveraged to improve drug delivery and bioavailability.