Fmoc-HoTyr-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected tyrosine derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group protects the amino group during the synthesis process. This compound is essential for constructing peptides with specific sequences, as it allows for the precise incorporation of tyrosine residues. It is commonly employed in the production of bioactive peptides, pharmaceuticals, and research peptides. The Fmoc group can be easily removed under mild basic conditions, making it a preferred choice in peptide chemistry. Additionally, it is used in the development of peptide-based drugs, antibodies, and other therapeutic agents.