Fmoc-Lys(Boc)-Wang resin is widely used in solid-phase peptide synthesis (SPPS) as a solid support for the stepwise assembly of peptides. The Fmoc (fluorenylmethyloxycarbonyl) group serves as a temporary protecting group for the amino group, allowing for selective deprotection during the synthesis process. The Boc (tert-butyloxycarbonyl) group protects the side chain of lysine, ensuring that the correct amino acid is incorporated at the desired position. The Wang resin provides a stable linkage to the peptide chain, which can be cleaved under mild acidic conditions to release the final peptide product. This resin is particularly useful for synthesizing peptides with lysine residues, as it ensures efficient coupling and deprotection steps while maintaining the integrity of the peptide sequence. Its application is essential in the production of peptides for research, pharmaceuticals, and biotechnology.