Fmoc-Cys(Trt)-OPfp is an Fmoc protected cysteine derivative potentially useful for proteomics studies, and solid phase peptide synthesis techniques. Cysteine is versatile amino acid involved with many biological processes, including the formation of disulfide bonds - a critical component of protein structure. This compound could be useful as an unusual amino acid analog to aid in the deconvolution of protein structure and function.An Fmoc protected cysteine derivative Fmoc-Cys(Trt)-OPfp is an Fmoc protected cysteine derivative potentially useful for proteomics studies, and solid phase peptide synthesis techniques. Cysteine is versatile amino acid involved with many biological processes, including the formation of disulfide bonds - a critical component of protein structure. This compound could be useful as an unusual amino acid analog to aid in the deconvolution of protein structure and function. An Fmoc protected cysteine derivative