Which institution can offer Customized Synthesized Peptide/Proteins?

Question

In the quantitative proteomics research, several MS-based methodologies for relative quantification have been introduced for comparison of different proteomes from collected biological samples. Meanwhile, MS-based methods for absolute quantification of specific proteins have been developed to accurately determine the protein concentrations. According to the guidelines for bioanalytical methods, the establishment and validation of accurate analytic proposals require standard compounds of high purity for calibrating and quality controls.so which institution specialized in the custom synthesis of synthetic peptides and peptide based molecules, providing a confidential and efficient service at competitive prices.