Fmoc-D-Glutamine is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group acts as a temporary protecting group for the amino functionality. This allows for the sequential addition of amino acids to build peptides with high precision. The D-glutamine component is valuable in creating peptides with specific chiral properties, which are essential in studying biological activity and developing therapeutic agents. Its application is critical in the production of custom peptides for research, drug development, and biotechnology applications.