Table S1 - Identification and Monitoring of Host Cell Proteins by Mass Spectrometry Combined with High Performance Immunochemistry Testing

Repeatability of HCP identification results. Database query was conducted by analyzing LC-MS/MS CID spectra using Proteome Discoverer V1.3 and a false discovery rate FDR < 1% of three purification step 1 elution pool samples (three independent sample preparations). The Top 15 HCPs were sorted according to the score value of Analysis 1. Accession number, http://www.uniprot.org/; MW, theoretical molecular weight. (XLSX)