Fmoc-3-(aminooxy)acetic acid is widely used in peptide synthesis as a protecting group for aminooxy functionalities. It enables the selective modification of peptides, particularly in the construction of oxime-linked conjugates, which are valuable in bioconjugation and drug delivery systems. The Fmoc group provides stability during synthesis and can be easily removed under mild conditions, making it a preferred choice in solid-phase peptide synthesis. Additionally, it is employed in the development of peptide-based vaccines and targeted therapeutics, where precise conjugation of peptides to other molecules is essential. Its application extends to the study of protein-protein interactions and the design of bioactive peptides with enhanced stability and specificity.