custom peptide synthesis

Regarding its success in MS-based quantification of small molecules, the isotope dilution strategy has been recognized as the reference method for internal standardization, introduced into protein quantification with unique advantages over conventional ligand binding assay. In these approaches, the sample is spiked with defined amounts of stable isotope-labeled analogue(s) of unique peptides (AQUA strategy) or intact target protein(s) (PSAQ strategy), to establish the calibrating curves. The mass spec standards of high purity, no matter AQUA peptides or PSAQ proteins, Creative Proteomics can help to synthesize it, to promote your research.